例如：# file: math_functions.pydefsquare(x):returnx*xdefcube(x):returnx*x*x此文件是一个模块，名为math_functions.py，它包含了两个函数：square和cube。如果我们想在另一个文件中使用这两个函数，我们可以使用import语句导入它：# file: main.pyimportmath_function
# -*- coding: utf-8 -*-importsyssys.path.extend(['/home/charlie/ssd/toshan'])fromstock_research.data_functionsimport*# 先import自己的包,如果重复需要用比如pandas,后面再import,之前的话都是灰色了fromdatetimeimportdatetimeimportmatplotlib.pyplotaspltimportosfromcollectionsimportOrderedDict# python 3.7 ...
E:\PythonProjects\跟着MS学Python>python -u "e:\PythonProjects\跟着MS学Python\#12\1.py" 555 # 全局变量能正确访问 Traceback (most recent call last): # 局部变量不能够访问 File "e:\PythonProjects\跟着MS学Python\#12\1.py", line 12, in <module> print(jv_bu_bian_liang) NameError: name...
Built-in Functions String Methods List/Array Methods Dictionary Methods Tuple Methods Set Methods File Methods Python Keywords Python Exceptions Python Glossary Random Module Requests Module Math Module CMath Module Download Python Download Python from the official Python web site:https://python.org ...
>>>print(__name__)__main__>>>print(__doc__)None>>>importtime>>>time.__name__'time'>>>time.__doc__'This module provides various functions to manipulate time values.' 内置作用域 现在我们进入本文的主题——内置作用域。 关于Python 的内置作用域,以下两个方面需要了解: ...
import mymodulemymodule.greeting("Jonathan") Run Example » Note: When using a function from a module, use the syntax: module_name.function_name.Variables in ModuleThe module can contain functions, as already described, but also variables of all types (arrays, dictionaries, objects etc):Exa...
All the usual tools for reusability are available. Now, you’ll create a module where you store your decorators and that you can use in many other functions.Create a file called decorators.py with the following content:Python decorators.py def do_twice(func): def wrapper_do_twice(): ...
sys模块官方解释:This module provides access to some variables used or maintained by the interpreter and to functions that interact strongly with the interpreter. 这个模块可供访问由解释器使用或维护的变量和与解释器进行交互的函数。 sys.argv 命令行参数List,第一个元素是程序本身路径 ...
In this step-by-step tutorial, you’ll learn all about Python’s math module for higher-level mathematical functions. Whether you’re working on a scientific project, a financial application, or any other type of programming endeavor, you just can’t esc
Each module has its own private symbol table, which is used as the global symbol table by all functions defined in the module. Thus, the author of a module can use global variables in the module without worrying about accidental clashes with a user’s global variables. On the other hand,...