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requirements.txt

The requirements.txt file is used to list custom Python packages required for script execution.

For more details, please refer to Python Packages.

Syntax​

To specify the version of a Python package in the requirements.txt file, you can use the following syntax:

package == version       # Installs the exact version specified
package > version        # Installs a version greater than the specified version
package >= version       # Installs a version greater than or equal to the specified version
package < version        # Installs a version less than the specified version
package <= version       # Installs a version less than or equal to the specified version
package != version       # Installs a version other than the specified version
package ~= version       # Installs a compatible release of the specified version

You can also specify multiple conditions for a package by separating them with a comma, like this:

package >= 1.0, <= 2.0    # Installs a version between 1.0 and 2.0, inclusive

Example​

###### Requirements without Version Specifiers ######
nose
nose-cov
beautifulsoup4

###### Requirements with Version Specifiers ######
docopt == 0.6.1             # Version Matching. Must be version 0.6.1
keyring >= 4.1.1            # Minimum version 4.1.1
coverage != 3.5             # Version Exclusion. Anything except version 3.5
Mopidy-Dirble ~= 1.1        # Compatible release. Same as >= 1.1, == 1.*