覆盖函数内部的全局变量不适用于Spyder 4 [英] Override global variable inside function not working with Spyder 4

问题描述

我尝试从函数中覆盖全局定义的数据框。
不知何故，全局值不会改变，在函数中打印数据框符合预期值。

I try to override globally defined Dataframes from within a function. Somehow the global values do not change, printing the dataframes within the functions works with the expected values.

import pandas as pd

rawData = pd.read_csv("music.csv")
appTitles =pd.DataFrame #also with pd.DataFrame() wont get affected

def loadTitles(df=rawData):
    global appTitles
    appTitles = pd.DataFrame({'Title' : df['title']})
    print(appTitles) 
return appTitles #(second 'print' to screen)

#RUN FILE
#CALL FUNCTION: loadTitles() #-> No Variable appTitles

变量资源管理器中的appTitles变量保持为空或不存在（取决于pd.DataFrame的使用） /pd.DataFrame（））谢谢！

The appTitles variable in the variable explorer remains empty or nonexistent (depending use of pd.DataFrame/pd.DataFrame()) Thank you!

编辑： @ 4turkuaz评论说在他的环境上一切正常，我尝试了Python Windows cmd以及Spyder3和Python 3.7.4&在IPython 7.8.0上也一切正常。

After @4turkuaz commented that on his environment everthing works as expected, I tried Python console within Windows cmd and also on Spyder3 with Python 3.7.4 & IPython 7.8.0 where also everything worked fine.

仅在Spyder4和Python 3.7.5& IPython 7.10.1无法正常工作。也许是个错误？我不知道...

Only on Spyder4 with Python 3.7.5 & IPython 7.10.1 it won't work. Maybe a bug? I don't know...

编辑：：将Spyder4降级为Python 3.7.4& IPython 7.8.0不能解决问题。我假设即使一遍又一遍地安装，在Spyder4或Anaconca环境中的某些东西也不正确。

Downgrading Spyder4 to Python 3.7.4 & IPython 7.8.0 did not solve the problem. I'm assuming that something within Spyder4 or the Anaconca Environment even though I installed it over and over is not correct.

推荐答案

（ Spyder维护人员），您需要进入菜单

(Spyder maintainer here) You need to go to the menu

运行>每个文件的配置

并激活名为的选项，在控制台的命名空间中运行，而不是一个空的，以便您能够修改代码中的全局变量。

and activate the option called Run in console's namespace instead of an empty one, for you to be able to modify global variables in your code.

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