python importing a function in which I define a global variable [duplicate]
This question already has an answer here:
Get variable from another file - python
1 answer
I'm having difficulty accessing a variable.
I'm working toward the following, calling python script from bash, with arguments, which then imports a function defined in a second python script, executes it and thereby creates a variable which will be used later in the first python script.
At the moment,to test I'm copying and pasting directly into a Python terminal some commands like this:
from script2 import *
foofunction(arg)
print(newlist)
The foo function defined in script2 is executing, I can see files have been written but when I try to print the list supposedly created while executing the imported function, I get a message telling me it's undefined.
Inside my script2.py, i made sure to enter a statement
global newlist
before defining its length and populating it.
I'm scratching my head at this stage.
python variables global
edited Jan 18 at 17:49
Tomka Koliada
497117
asked Jan 18 at 16:07
curlycurly
135
marked as duplicate by TheIncorrigible1, Idlehands, Prune python
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Jan 18 at 16:37
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
add a comment |
This question already has an answer here:
Get variable from another file - python
1 answer
I'm having difficulty accessing a variable.
I'm working toward the following, calling python script from bash, with arguments, which then imports a function defined in a second python script, executes it and thereby creates a variable which will be used later in the first python script.
At the moment,to test I'm copying and pasting directly into a Python terminal some commands like this:
from script2 import *
foofunction(arg)
print(newlist)
The foo function defined in script2 is executing, I can see files have been written but when I try to print the list supposedly created while executing the imported function, I get a message telling me it's undefined.
Inside my script2.py, i made sure to enter a statement
global newlist
before defining its length and populating it.
I'm scratching my head at this stage.
python variables global
edited Jan 18 at 17:49
Tomka Koliada
497117
asked Jan 18 at 16:07
curlycurly
135
marked as duplicate by TheIncorrigible1, Idlehands, Prune python
Users with the python badge can single-handedly close python questions as duplicates and reopen them as needed.
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Jan 18 at 16:37
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
3
Please include the relevant code from script2.py :)
– KuboMD
Jan 18 at 16:08
2
Why don't youreturn newlistin that function and assign it to a variable?
– Graipher
Jan 18 at 16:08
1
Theglobalkeyword does not work that way in python. Have a look here
– Valentino
Jan 18 at 16:11
I don't know why that didn't work when I tried it last night, but Graipher's solution is exactly correct. IF you want to throw that into an answer I'll gladly accept it.
– curly
Jan 18 at 16:18
2
from some_module import *is rarely a good practice as it mangles up your namespace. This is a prime example - without the knowledge ofscript2.pywe have no idea whetherfoofunctionandnewlistwould be aNameErroror an object that was defined inscript2.py. It's best to be explicit.
– Idlehands
Jan 18 at 16:19
add a comment |
This question already has an answer here:
Get variable from another file - python
1 answer
I'm having difficulty accessing a variable.
I'm working toward the following, calling python script from bash, with arguments, which then imports a function defined in a second python script, executes it and thereby creates a variable which will be used later in the first python script.
At the moment,to test I'm copying and pasting directly into a Python terminal some commands like this:
from script2 import *
foofunction(arg)
print(newlist)
The foo function defined in script2 is executing, I can see files have been written but when I try to print the list supposedly created while executing the imported function, I get a message telling me it's undefined.
Inside my script2.py, i made sure to enter a statement
global newlist
before defining its length and populating it.
I'm scratching my head at this stage.
python variables global
edited Jan 18 at 17:49
Tomka Koliada
497117
asked Jan 18 at 16:07
curlycurly
135
This question already has an answer here:
Get variable from another file - python
1 answer
I'm having difficulty accessing a variable.
I'm working toward the following, calling python script from bash, with arguments, which then imports a function defined in a second python script, executes it and thereby creates a variable which will be used later in the first python script.
At the moment,to test I'm copying and pasting directly into a Python terminal some commands like this:
from script2 import *
foofunction(arg)
print(newlist)
The foo function defined in script2 is executing, I can see files have been written but when I try to print the list supposedly created while executing the imported function, I get a message telling me it's undefined.
Inside my script2.py, i made sure to enter a statement
global newlist
before defining its length and populating it.
I'm scratching my head at this stage.
This question already has an answer here:
Get variable from another file - python
1 answer
python variables global
python variables global
edited Jan 18 at 17:49
Tomka Koliada
497117
asked Jan 18 at 16:07
curlycurly
135
edited Jan 18 at 17:49
Tomka Koliada
497117
asked Jan 18 at 16:07
curlycurly
135
edited Jan 18 at 17:49
Tomka Koliada
497117
edited Jan 18 at 17:49
Tomka Koliada
497117
edited Jan 18 at 17:49
Tomka Koliada
497117
497117
asked Jan 18 at 16:07
curlycurly
135
asked Jan 18 at 16:07
curlycurly
135
asked Jan 18 at 16:07
curlycurly
135
135
marked as duplicate by TheIncorrigible1, Idlehands, Prune python
Users with the python badge can single-handedly close python questions as duplicates and reopen them as needed.
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Jan 18 at 16:37
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
marked as duplicate by TheIncorrigible1, Idlehands, Prune python
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Jan 18 at 16:37
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
3
Please include the relevant code from script2.py :)
– KuboMD
Jan 18 at 16:08
2
Why don't youreturn newlistin that function and assign it to a variable?
– Graipher
Jan 18 at 16:08
1
Theglobalkeyword does not work that way in python. Have a look here
– Valentino
Jan 18 at 16:11
I don't know why that didn't work when I tried it last night, but Graipher's solution is exactly correct. IF you want to throw that into an answer I'll gladly accept it.
– curly
Jan 18 at 16:18
2
from some_module import *is rarely a good practice as it mangles up your namespace. This is a prime example - without the knowledge ofscript2.pywe have no idea whetherfoofunctionandnewlistwould be aNameErroror an object that was defined inscript2.py. It's best to be explicit.
– Idlehands
Jan 18 at 16:19
add a comment |
3
Please include the relevant code from script2.py :)
– KuboMD
Jan 18 at 16:08
2
Why don't youreturn newlistin that function and assign it to a variable?
– Graipher
Jan 18 at 16:08
1
Theglobalkeyword does not work that way in python. Have a look here
– Valentino
Jan 18 at 16:11
I don't know why that didn't work when I tried it last night, but Graipher's solution is exactly correct. IF you want to throw that into an answer I'll gladly accept it.
– curly
Jan 18 at 16:18
2
from some_module import *is rarely a good practice as it mangles up your namespace. This is a prime example - without the knowledge ofscript2.pywe have no idea whetherfoofunctionandnewlistwould be aNameErroror an object that was defined inscript2.py. It's best to be explicit.
– Idlehands
Jan 18 at 16:19
3
3
Please include the relevant code from script2.py :)
– KuboMD
Jan 18 at 16:08
Please include the relevant code from script2.py :)
– KuboMD
Jan 18 at 16:08
2
2
Why don't you
return newlist in that function and assign it to a variable?– Graipher
Jan 18 at 16:08
Why don't you
return newlist in that function and assign it to a variable?– Graipher
Jan 18 at 16:08
1
1
The
global keyword does not work that way in python. Have a look here– Valentino
Jan 18 at 16:11
The
global keyword does not work that way in python. Have a look here– Valentino
Jan 18 at 16:11
I don't know why that didn't work when I tried it last night, but Graipher's solution is exactly correct. IF you want to throw that into an answer I'll gladly accept it.
– curly
Jan 18 at 16:18
I don't know why that didn't work when I tried it last night, but Graipher's solution is exactly correct. IF you want to throw that into an answer I'll gladly accept it.
– curly
Jan 18 at 16:18
2
2
from some_module import * is rarely a good practice as it mangles up your namespace. This is a prime example - without the knowledge of script2.py we have no idea whether foofunction and newlist would be a NameError or an object that was defined in script2.py. It's best to be explicit.– Idlehands
Jan 18 at 16:19
from some_module import * is rarely a good practice as it mangles up your namespace. This is a prime example - without the knowledge of script2.py we have no idea whether foofunction and newlist would be a NameError or an object that was defined in script2.py. It's best to be explicit.– Idlehands
Jan 18 at 16:19
add a comment |
1 Answer
1
active
oldest
votes
You should refer to newlist and the module where it is defined like this:
from script2 import *
foofunction(arg)
print(script2.newlist)
answered Jan 18 at 16:28
nachonacho
2,65411223
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You should refer to newlist and the module where it is defined like this:
from script2 import *
foofunction(arg)
print(script2.newlist)
answered Jan 18 at 16:28
nachonacho
2,65411223
add a comment |
You should refer to newlist and the module where it is defined like this:
from script2 import *
foofunction(arg)
print(script2.newlist)
answered Jan 18 at 16:28
nachonacho
2,65411223
add a comment |
You should refer to newlist and the module where it is defined like this:
from script2 import *
foofunction(arg)
print(script2.newlist)
answered Jan 18 at 16:28
nachonacho
2,65411223
You should refer to newlist and the module where it is defined like this:
from script2 import *
foofunction(arg)
print(script2.newlist)
answered Jan 18 at 16:28
nachonacho
2,65411223
answered Jan 18 at 16:28
nachonacho
2,65411223
answered Jan 18 at 16:28
nachonacho
2,65411223
answered Jan 18 at 16:28
nachonacho
2,65411223
2,65411223
add a comment |
add a comment |
3
Please include the relevant code from script2.py :)
– KuboMD
Jan 18 at 16:08
2
Why don't you
return newlistin that function and assign it to a variable?– Graipher
Jan 18 at 16:08
1
The
globalkeyword does not work that way in python. Have a look here– Valentino
Jan 18 at 16:11
I don't know why that didn't work when I tried it last night, but Graipher's solution is exactly correct. IF you want to throw that into an answer I'll gladly accept it.
– curly
Jan 18 at 16:18
2
from some_module import *is rarely a good practice as it mangles up your namespace. This is a prime example - without the knowledge ofscript2.pywe have no idea whetherfoofunctionandnewlistwould be aNameErroror an object that was defined inscript2.py. It's best to be explicit.– Idlehands
Jan 18 at 16:19