What is the usage of import in python?

import in python is used to import modules.

Specific usage:

The following program uses the simplest syntax to import the entire module to import the specified module:

# 导入sys整个模块
import sys
# 使用sys模块名作为前缀来访问模块中的成员
print(sys.argv[0])

When importing the entire module, you can also specify an alias for the module. For example, the following program:

# 导入sys整个模块，并指定别名为s
import sys as s
# 使用s模块别名作为前缀来访问模块中的成员
print(s.argv[0])

You can also import multiple modules at one time, and separate multiple modules with commas. For example, the following program:

# 导入sys、os两个模块
import sys,os
# 使用模块名作为前缀来访问模块中的成员
print(sys.argv[0])
# os模块的sep变量代表平台上的路径分隔符
print(os.sep)

While importing multiple modules, you can also specify aliases for the modules, such as the following program:

# 导入sys、os两个模块，并为sys指定别名s，为os指定别名o
import sys as s,os as o
# 使用模块别名作为前缀来访问模块中的成员
print(s.argv[0])
print(o.sep)

Recommended tutorial: python tutorial

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