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annotate planemo/lib/python3.7/site-packages/humanfriendly/cli.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 # Human friendly input/output in Python.
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2 #
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3 # Author: Peter Odding <peter@peterodding.com>
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4 # Last Change: March 1, 2020
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5 # URL: https://humanfriendly.readthedocs.io
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6
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7 """
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8 Usage: humanfriendly [OPTIONS]
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9
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10 Human friendly input/output (text formatting) on the command
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11 line based on the Python package with the same name.
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12
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13 Supported options:
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14
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15 -c, --run-command
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16
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17 Execute an external command (given as the positional arguments) and render
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18 a spinner and timer while the command is running. The exit status of the
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19 command is propagated.
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20
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21 --format-table
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22
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23 Read tabular data from standard input (each line is a row and each
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24 whitespace separated field is a column), format the data as a table and
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25 print the resulting table to standard output. See also the --delimiter
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26 option.
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27
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28 -d, --delimiter=VALUE
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29
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30 Change the delimiter used by --format-table to VALUE (a string). By default
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31 all whitespace is treated as a delimiter.
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32
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33 -l, --format-length=LENGTH
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34
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35 Convert a length count (given as the integer or float LENGTH) into a human
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36 readable string and print that string to standard output.
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37
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38 -n, --format-number=VALUE
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39
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40 Format a number (given as the integer or floating point number VALUE) with
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41 thousands separators and two decimal places (if needed) and print the
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42 formatted number to standard output.
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43
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44 -s, --format-size=BYTES
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45
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46 Convert a byte count (given as the integer BYTES) into a human readable
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47 string and print that string to standard output.
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48
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49 -b, --binary
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50
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51 Change the output of -s, --format-size to use binary multiples of bytes
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52 (base-2) instead of the default decimal multiples of bytes (base-10).
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53
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54 -t, --format-timespan=SECONDS
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55
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56 Convert a number of seconds (given as the floating point number SECONDS)
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57 into a human readable timespan and print that string to standard output.
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58
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59 --parse-length=VALUE
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60
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61 Parse a human readable length (given as the string VALUE) and print the
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62 number of metres to standard output.
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63
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64 --parse-size=VALUE
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65
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66 Parse a human readable data size (given as the string VALUE) and print the
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67 number of bytes to standard output.
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68
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69 --demo
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70
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71 Demonstrate changing the style and color of the terminal font using ANSI
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72 escape sequences.
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73
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74 -h, --help
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75
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76 Show this message and exit.
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77 """
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78
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79 # Standard library modules.
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80 import functools
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81 import getopt
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82 import pipes
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83 import subprocess
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84 import sys
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85
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86 # Modules included in our package.
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87 from humanfriendly import (
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88 Timer,
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89 format_length,
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90 format_number,
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91 format_size,
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92 format_timespan,
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93 parse_length,
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94 parse_size,
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95 )
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96 from humanfriendly.tables import format_pretty_table, format_smart_table
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97 from humanfriendly.terminal import (
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98 ANSI_COLOR_CODES,
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99 ANSI_TEXT_STYLES,
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100 HIGHLIGHT_COLOR,
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101 ansi_strip,
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102 ansi_wrap,
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103 enable_ansi_support,
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104 find_terminal_size,
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105 output,
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106 usage,
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107 warning,
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108 )
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109 from humanfriendly.terminal.spinners import Spinner
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110
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111 # Public identifiers that require documentation.
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112 __all__ = (
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113 'demonstrate_256_colors',
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114 'demonstrate_ansi_formatting',
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115 'main',
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116 'print_formatted_length',
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117 'print_formatted_number',
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118 'print_formatted_size',
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119 'print_formatted_table',
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120 'print_formatted_timespan',
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121 'print_parsed_length',
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122 'print_parsed_size',
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123 'run_command',
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124 )
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125
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126
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127 def main():
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128 """Command line interface for the ``humanfriendly`` program."""
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129 enable_ansi_support()
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130 try:
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131 options, arguments = getopt.getopt(sys.argv[1:], 'cd:l:n:s:bt:h', [
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132 'run-command', 'format-table', 'delimiter=', 'format-length=',
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133 'format-number=', 'format-size=', 'binary', 'format-timespan=',
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134 'parse-length=', 'parse-size=', 'demo', 'help',
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135 ])
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136 except Exception as e:
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137 warning("Error: %s", e)
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138 sys.exit(1)
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139 actions = []
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140 delimiter = None
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141 should_format_table = False
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142 binary = any(o in ('-b', '--binary') for o, v in options)
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143 for option, value in options:
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144 if option in ('-d', '--delimiter'):
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145 delimiter = value
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146 elif option == '--parse-size':
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147 actions.append(functools.partial(print_parsed_size, value))
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148 elif option == '--parse-length':
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149 actions.append(functools.partial(print_parsed_length, value))
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150 elif option in ('-c', '--run-command'):
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151 actions.append(functools.partial(run_command, arguments))
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152 elif option in ('-l', '--format-length'):
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153 actions.append(functools.partial(print_formatted_length, value))
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154 elif option in ('-n', '--format-number'):
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155 actions.append(functools.partial(print_formatted_number, value))
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156 elif option in ('-s', '--format-size'):
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157 actions.append(functools.partial(print_formatted_size, value, binary))
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158 elif option == '--format-table':
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159 should_format_table = True
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160 elif option in ('-t', '--format-timespan'):
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161 actions.append(functools.partial(print_formatted_timespan, value))
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162 elif option == '--demo':
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163 actions.append(demonstrate_ansi_formatting)
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164 elif option in ('-h', '--help'):
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165 usage(__doc__)
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166 return
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167 if should_format_table:
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168 actions.append(functools.partial(print_formatted_table, delimiter))
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169 if not actions:
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170 usage(__doc__)
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171 return
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172 for partial in actions:
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173 partial()
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174
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175
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176 def run_command(command_line):
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177 """Run an external command and show a spinner while the command is running."""
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178 timer = Timer()
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179 spinner_label = "Waiting for command: %s" % " ".join(map(pipes.quote, command_line))
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180 with Spinner(label=spinner_label, timer=timer) as spinner:
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181 process = subprocess.Popen(command_line)
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182 while True:
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183 spinner.step()
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184 spinner.sleep()
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185 if process.poll() is not None:
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186 break
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187 sys.exit(process.returncode)
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188
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189
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190 def print_formatted_length(value):
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191 """Print a human readable length."""
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192 if '.' in value:
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193 output(format_length(float(value)))
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194 else:
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195 output(format_length(int(value)))
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196
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197
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198 def print_formatted_number(value):
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199 """Print large numbers in a human readable format."""
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200 output(format_number(float(value)))
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201
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202
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203 def print_formatted_size(value, binary):
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204 """Print a human readable size."""
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205 output(format_size(int(value), binary=binary))
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206
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207
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208 def print_formatted_table(delimiter):
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209 """Read tabular data from standard input and print a table."""
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210 data = []
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211 for line in sys.stdin:
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212 line = line.rstrip()
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213 data.append(line.split(delimiter))
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214 output(format_pretty_table(data))
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215
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216
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217 def print_formatted_timespan(value):
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218 """Print a human readable timespan."""
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219 output(format_timespan(float(value)))
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220
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221
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222 def print_parsed_length(value):
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223 """Parse a human readable length and print the number of metres."""
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224 output(parse_length(value))
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225
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226
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227 def print_parsed_size(value):
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228 """Parse a human readable data size and print the number of bytes."""
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229 output(parse_size(value))
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230
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231
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232 def demonstrate_ansi_formatting():
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233 """Demonstrate the use of ANSI escape sequences."""
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234 # First we demonstrate the supported text styles.
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235 output('%s', ansi_wrap('Text styles:', bold=True))
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236 styles = ['normal', 'bright']
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237 styles.extend(ANSI_TEXT_STYLES.keys())
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238 for style_name in sorted(styles):
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239 options = dict(color=HIGHLIGHT_COLOR)
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240 if style_name != 'normal':
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241 options[style_name] = True
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242 style_label = style_name.replace('_', ' ').capitalize()
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243 output(' - %s', ansi_wrap(style_label, **options))
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244 # Now we demonstrate named foreground and background colors.
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245 for color_type, color_label in (('color', 'Foreground colors'),
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246 ('background', 'Background colors')):
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247 intensities = [
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248 ('normal', dict()),
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249 ('bright', dict(bright=True)),
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250 ]
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251 if color_type != 'background':
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252 intensities.insert(0, ('faint', dict(faint=True)))
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253 output('\n%s' % ansi_wrap('%s:' % color_label, bold=True))
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254 output(format_smart_table([
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255 [color_name] + [
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256 ansi_wrap(
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257 'XXXXXX' if color_type != 'background' else (' ' * 6),
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258 **dict(list(kw.items()) + [(color_type, color_name)])
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259 ) for label, kw in intensities
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260 ] for color_name in sorted(ANSI_COLOR_CODES.keys())
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261 ], column_names=['Color'] + [
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262 label.capitalize() for label, kw in intensities
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263 ]))
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264 # Demonstrate support for 256 colors as well.
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265 demonstrate_256_colors(0, 7, 'standard colors')
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266 demonstrate_256_colors(8, 15, 'high-intensity colors')
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267 demonstrate_256_colors(16, 231, '216 colors')
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268 demonstrate_256_colors(232, 255, 'gray scale colors')
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269
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270
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271 def demonstrate_256_colors(i, j, group=None):
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272 """Demonstrate 256 color mode support."""
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273 # Generate the label.
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274 label = '256 color mode'
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275 if group:
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276 label += ' (%s)' % group
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277 output('\n' + ansi_wrap('%s:' % label, bold=True))
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278 # Generate a simple rendering of the colors in the requested range and
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279 # check if it will fit on a single line (given the terminal's width).
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280 single_line = ''.join(' ' + ansi_wrap(str(n), color=n) for n in range(i, j + 1))
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281 lines, columns = find_terminal_size()
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282 if columns >= len(ansi_strip(single_line)):
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283 output(single_line)
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284 else:
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285 # Generate a more complex rendering of the colors that will nicely wrap
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286 # over multiple lines without using too many lines.
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287 width = len(str(j)) + 1
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288 colors_per_line = int(columns / width)
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289 colors = [ansi_wrap(str(n).rjust(width), color=n) for n in range(i, j + 1)]
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290 blocks = [colors[n:n + colors_per_line] for n in range(0, len(colors), colors_per_line)]
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291 output('\n'.join(''.join(b) for b in blocks))