【python tip】如何调用另外一个.py文件中的函数

最新推荐文章于 2025-10-08 16:21:14 发布
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本文演示了在同一目录下如何从一个Python文件b.py中导入并使用另一个文件a.py中定义的add函数，实现两个数字相加的操作。

同一文件夹下

b.py调用a.py里的add函数

a.py

def add(x,y):
    return x+y

b.py 

from a import add
b=add(1,2);
print(b);

 

 

如何在Python中调用另一个文件的函数？新手必看指南
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本文介绍了在Python中如何调用另一个文件中的函数，适合初学者快速掌握。首先，通过一个简单的项目示例，展示了三种常用的导入方法：导入整个模块、导入特定函数以及给模块起别名。接着，详细讲解了文件存放位置的讲究，包括文件在同一文件夹、子文件夹和父文件夹中的不同导入方式。对于实际项目，建议使用包结构来组织代码，并提供了最佳实践示例。最后，解答了常见问题，如导入错误、循环导入和复用工具函数等。通过本文，读者可以学会如何在Python中有效地调用其他文件中的函数，并避免常见的路径和导入问题。
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在项目管理方面，推荐使用研发项目管理系统PingCode，它专为研发项目设计，功能强大且易于使用。另一个推荐的通用项目管理软件是Worktile，它适用于各种类型的项目管理需求。通过使用这些工具，可以更好地管理和协调项目，提高团队的工作效率。
【python学习】如何在一个python文件中调用另一个python文件的函数
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在Python中，你可以通过import语句来调用另一个Python文件中的函数。main.py和helper.py，并且你想要在main.py中调用helper.py中的函数。首先，确保helper.py文件中有一个你可以调用的函数。例如，helper.py然后，在main.py文件中，你可以使用import语句来导入helper.py模块，并调用其中的函数。
python调用其他文件函数或类的示例
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B.py调用A.py的函数或类 在同一个文件夹下 调用函数： A.py文件： def add(x,y): print('和为：%d'%(x+y)) B.py文件： import A A.add(1,2) 或 from A import add add(1,2) 调用类： A.py文件: class A: def __init__(self,xx,yy): self.x=xx self.y=yy def add(self): print(x和y的和为：%d%(self.x+self.y)) B.py文件： from A import A
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python调用其他文件中的函数或者类
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01 在同一个文件夹下，调用函数或者类 A.py文件中 def test(): print('this is test func') class A: def test(): print('this is a class named A, its func is test() ') B.py文件中 # way 1 from A import test from A i...
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在Pycharm的专业版中，提供了一个分析项目性能的工具run->Profile，可以将工程运行时各函数的调用次数和所用时间记录下来，提供静态数据和关系图表两种表达方式。 只需轻轻一点，统计数据和图表关系一览无遗，确实方便。但是此方法局限性很大，一是必须使用pycharm，这样使用其他ide如VS Code的用户就没法使用了；二是它不仅要使用pychram，还得是专业版，专业版是要收费的(破解和学生版除外)，这又是一道坎挡在了我们的路上。那么有其他的方法来进行类似的分析吗？当然是有的。 profi
Exception in thread Thread-1 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-2 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-3 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-4 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-5 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-6 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-7 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-8 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-9 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-10 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-11 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-12 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-13 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-14 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-15 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-16 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Exception in thread Thread-17 (show_warn_tip): Traceback (most recent call last): File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner self.run() File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run self._target(*self._args, **self._kwargs) File "C:\Users\Administrator\Desktop\1.py", line 42, in show_warn_tip root = tk.Toplevel() ^^^^^^^^^^^^^ File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2697, in __init__ BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra) File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 2648, in __init__ self.tk.call( RuntimeError: main thread is not in main loop Traceback (most recent call last): File "C:\Users\Administrator\Desktop\1.py", line 76, in <module> time.sleep(0.12) # 放慢节奏，确保能看清文字 ^^^^^^^^^^^^^^^^ KeyboardInterrupt以上代码运行过后还是有报错请帮我修改后发出来
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