[已解决]求问python求解定积分

小猴猴

我用这个方法求解定积分，之前尝试成功过，突然就报错NameError，请问大神们是怎么回事呢？

1. from sympy import *
   
2. x = symbols('x')
   
3. print(integrate(x, (x, 1, 2)))

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然后会报下面错误

1. D:\python\python.exe D:/python/Python_Documents/HProject/稳定计算/位移计算.py
   
2. Traceback (most recent call last):
   
3.   File "D:/python/Python_Documents/HProject/稳定计算/位移计算.py", line 1, in <module>
   
4.     from sympy import *
   
5.   File "D:\python\lib\site-packages\sympy\__init__.py", line 22, in <module>
   
6.     import mpmath
   
7.   File "D:\python\lib\site-packages\mpmath\__init__.py", line 5, in <module>
   
8.     from .ctx_fp import FPContext
   
9.   File "D:\python\lib\site-packages\mpmath\ctx_fp.py", line 1, in <module>
   
10.     from .ctx_base import StandardBaseContext
    
11.   File "D:\python\lib\site-packages\mpmath\ctx_base.py", line 10, in <module>
    
12.     from .calculus.optimization import OptimizationMethods
    
13.   File "D:\python\lib\site-packages\mpmath\calculus\optimization.py", line 3, in <module>
    
14.     from copy import copy
    
15.   File "D:\python\Python_Documents\HProject\稳定计算\copy.py", line 2, in <module>
    
16.     x = symbols('x')
    
17. NameError: name 'symbols' is not defined
    
18. 
    
19. Process finished with exit code 1
    

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最佳答案

月排行榜 / 总排行榜

hrp

2021-3-2 07:14:04

你的源代码不要命名为copy.py，换个名字

跳转到最佳答案楼层

Daniel_Zhang

不知道啊，我机器上这段代码是好的

Hela

多了个括号还是少了个

hrp

你的源代码不要命名为copy.py，换个名字

wp231957

d:\wp>py
Python 3.8.2 (tags/v3.8.2:7b3ab59, Feb 25 2020, 23:03:10) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from sympy import *
>>> x = symbols('x')
>>> print(integrate(x, (x, 1, 2)))
3/2
>>>

小猴猴

hrp 发表于 2021-3-2 07:14
你的源代码不要命名为copy.py，换个名字

感谢，解决了