1 | usage: mypy [-h] [-v] [-V] [more options; see below]
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2 | [-m MODULE] [-p PACKAGE] [-c PROGRAM_TEXT] [files ...]
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3 |
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4 | Mypy is a program that will type check your Python code.
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5 |
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6 | Pass in any files or folders you want to type check. Mypy will
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7 | recursively traverse any provided folders to find .py files:
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8 |
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9 | $ mypy my_program.py my_src_folder
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10 |
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11 | For more information on getting started, see:
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12 |
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13 | - http://mypy.readthedocs.io/en/latest/getting_started.html
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14 |
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15 | For more details on both running mypy and using the flags below, see:
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16 |
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17 | - http://mypy.readthedocs.io/en/latest/running_mypy.html
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18 | - http://mypy.readthedocs.io/en/latest/command_line.html
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19 |
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20 | You can also use a config file to configure mypy instead of using
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21 | command line flags. For more details, see:
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22 |
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23 | - http://mypy.readthedocs.io/en/latest/config_file.html
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24 |
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25 | Optional arguments:
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26 | -h, --help Show this help message and exit
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27 | -v, --verbose More verbose messages
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28 | -V, --version Show program's version number and exit
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29 |
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30 | Config file:
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31 | Use a config file instead of command line arguments. This is useful if you
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32 | are using many flags or want to set different options per each module.
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33 |
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34 | --config-file CONFIG_FILE
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35 | Configuration file, must have a [mypy] section
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36 | (defaults to mypy.ini, setup.cfg, ~/.mypy.ini)
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37 | --warn-unused-configs Warn about unused '[mypy-<pattern>]' config
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38 | sections (inverse: --no-warn-unused-configs)
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39 |
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40 | Import discovery:
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41 | Configure how imports are discovered and followed.
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42 |
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43 | --ignore-missing-imports Silently ignore imports of missing modules
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44 | --follow-imports {normal,silent,skip,error}
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45 | How to treat imports (default normal)
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46 | --python-executable EXECUTABLE
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47 | Python executable used for finding PEP 561
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48 | compliant installed packages and stubs
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49 | --no-site-packages Do not search for installed PEP 561 compliant
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50 | packages
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51 | --no-silence-site-packages
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52 | Do not silence errors in PEP 561 compliant
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53 | installed packages
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54 | --namespace-packages Support namespace packages (PEP 420, __init__.py-
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55 | less) (inverse: --no-namespace-packages)
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56 |
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57 | Platform configuration:
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58 | Type check code assuming it will be run under certain runtime conditions.
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59 | By default, mypy assumes your code will be run using the same operating
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60 | system and Python version you are using to run mypy itself.
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61 |
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62 | --python-version x.y Type check code assuming it will be running on
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63 | Python x.y
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64 | -2, --py2 Use Python 2 mode (same as --python-version 2.7)
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65 | --platform PLATFORM Type check special-cased code for the given OS
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66 | platform (defaults to sys.platform)
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67 | --always-true NAME Additional variable to be considered True (may be
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68 | repeated)
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69 | --always-false NAME Additional variable to be considered False (may be
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70 | repeated)
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71 |
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72 | Dynamic typing:
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73 | Disallow the use of the dynamic 'Any' type under certain conditions.
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74 |
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75 | --disallow-any-unimported
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76 | Disallow Any types resulting from unfollowed
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77 | imports
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78 | --disallow-subclassing-any
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79 | Disallow subclassing values of type 'Any' when
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80 | defining classes (inverse: --allow-subclassing-
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81 | any)
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82 | --disallow-any-expr Disallow all expressions that have type Any
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83 | --disallow-any-decorated Disallow functions that have Any in their
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84 | signature after decorator transformation
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85 | --disallow-any-explicit Disallow explicit Any in type positions
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86 | --disallow-any-generics Disallow usage of generic types that do not
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87 | specify explicit type parameters (inverse:
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88 | --allow-any-generics)
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89 |
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90 | Untyped definitions and calls:
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91 | Configure how untyped definitions and calls are handled. Note: by default,
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92 | mypy ignores any untyped function definitions and assumes any calls to
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93 | such functions have a return type of 'Any'.
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94 |
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95 | --disallow-untyped-calls Disallow calling functions without type
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96 | annotations from functions with type annotations
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97 | (inverse: --allow-untyped-calls)
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98 | --disallow-untyped-defs Disallow defining functions without type
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99 | annotations or with incomplete type annotations
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100 | (inverse: --allow-untyped-defs)
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101 | --disallow-incomplete-defs
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102 | Disallow defining functions with incomplete type
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103 | annotations (inverse: --allow-incomplete-defs)
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104 | --check-untyped-defs Type check the interior of functions without type
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105 | annotations (inverse: --no-check-untyped-defs)
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106 | --disallow-untyped-decorators
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107 | Disallow decorating typed functions with untyped
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108 | decorators (inverse: --allow-untyped-decorators)
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109 |
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110 | None and Optional handling:
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111 | Adjust how values of type 'None' are handled. For more context on how mypy
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112 | handles values of type 'None', see:
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113 | mypy.readthedocs.io/en/latest/kinds_of_types.html#no-strict-optional
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114 |
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115 | --no-implicit-optional Don't assume arguments with default values of None
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116 | are Optional (inverse: --implicit-optional)
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117 | --no-strict-optional Disable strict Optional checks (inverse: --strict-
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118 | optional)
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119 | --strict-optional-whitelist [GLOB [GLOB ...]]
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120 | Suppress strict Optional errors in all but the
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121 | provided files; implies --strict-optional (may
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122 | suppress certain other errors in non-whitelisted
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123 | files)
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124 |
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125 | Warnings:
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126 | Detect code that is sound but redundant or problematic.
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127 |
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128 | --warn-redundant-casts Warn about casting an expression to its inferred
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129 | type (inverse: --no-warn-redundant-casts)
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130 | --warn-unused-ignores Warn about unneeded '# type: ignore' comments
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131 | (inverse: --no-warn-unused-ignores)
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132 | --no-warn-no-return Do not warn about functions that end without
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133 | returning (inverse: --warn-no-return)
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134 | --warn-return-any Warn about returning values of type Any from non-
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135 | Any typed functions (inverse: --no-warn-return-
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136 | any)
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137 |
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138 | Other strictness checks:
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139 | --allow-untyped-globals Suppress toplevel errors caused by missing
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140 | annotations (inverse: --disallow-untyped-globals)
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141 | --strict Strict mode; enables the following flags: --warn-
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142 | unused-configs, --disallow-subclassing-any,
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143 | --disallow-any-generics, --disallow-untyped-calls,
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144 | --disallow-untyped-defs, --disallow-incomplete-
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145 | defs, --check-untyped-defs, --disallow-untyped-
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146 | decorators, --no-implicit-optional, --warn-
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147 | redundant-casts, --warn-unused-ignores, --warn-
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148 | return-any
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149 |
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150 | Incremental mode:
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151 | Adjust how mypy incrementally type checks and caches modules. Mypy caches
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152 | type information about modules into a cache to let you speed up future
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153 | invocations of mypy. Also see mypy's daemon mode:
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154 | mypy.readthedocs.io/en/latest/mypy_daemon.html#mypy-daemon
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155 |
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156 | --no-incremental Disable module cache (inverse: --incremental)
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157 | --cache-dir DIR Store module cache info in the given folder in
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158 | incremental mode (defaults to '.mypy_cache')
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159 | --sqlite-cache Use a sqlite database to store the cache (inverse:
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160 | --no-sqlite-cache)
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161 | --cache-fine-grained Include fine-grained dependency information in the
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162 | cache for the mypy daemon
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163 | --skip-version-check Allow using cache written by older mypy version
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164 |
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165 | Mypy internals:
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166 | Debug and customize mypy internals.
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167 |
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168 | --pdb Invoke pdb on fatal error
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169 | --show-traceback, --tb Show traceback on fatal error
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170 | --raise-exceptions Raise exception on fatal error
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171 | --custom-typing MODULE Use a custom typing module
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172 | --custom-typeshed-dir DIR
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173 | Use the custom typeshed in DIR
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174 | --warn-incomplete-stub Warn if missing type annotation in typeshed, only
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175 | relevant with --disallow-untyped-defs or
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176 | --disallow-incomplete-defs enabled (inverse: --no-
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177 | warn-incomplete-stub)
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178 | --shadow-file SOURCE_FILE SHADOW_FILE
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179 | When encountering SOURCE_FILE, read and type check
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180 | the contents of SHADOW_FILE instead.
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181 |
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182 | Error reporting:
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183 | Adjust the amount of detail shown in error messages.
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184 |
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185 | --show-error-context Precede errors with "note:" messages explaining
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186 | context (inverse: --hide-error-context)
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187 | --show-column-numbers Show column numbers in error messages (inverse:
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188 | --hide-column-numbers)
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189 |
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190 | Report generation:
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191 | Generate a report in the specified format.
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192 |
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193 | --any-exprs-report DIR
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194 | --cobertura-xml-report DIR
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195 | --html-report DIR
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196 | --linecount-report DIR
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197 | --linecoverage-report DIR
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198 | --memory-xml-report DIR
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199 | --txt-report DIR
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200 | --xml-report DIR
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201 | --xslt-html-report DIR
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202 | --xslt-txt-report DIR
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203 |
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204 | Miscellaneous:
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205 | --junit-xml JUNIT_XML Write junit.xml to the given file
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206 | --scripts-are-modules Script x becomes module x instead of __main__
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207 | --find-occurrences CLASS.MEMBER
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208 | Print out all usages of a class member
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209 | (experimental)
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210 |
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211 | Running code:
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212 | Specify the code you want to type check. For more details, see
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213 | mypy.readthedocs.io/en/latest/running_mypy.html#running-mypy
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214 |
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215 | -m MODULE, --module MODULE
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216 | Type-check module; can repeat for more modules
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217 | -p PACKAGE, --package PACKAGE
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218 | Type-check package recursively; can be repeated
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219 | -c PROGRAM_TEXT, --command PROGRAM_TEXT
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220 | Type-check program passed in as string
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221 | files Type-check given files or directories
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222 |
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223 | Environment variables:
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224 | Define MYPYPATH for additional module search path entries.
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