Trying to understand variable scope in python [duplicate]

This question already has an answer here:

How to change a variable after it is already defined?

6 answers

I gave this following program in Python just to understand scopes of variables, but I'm getting the error:

count = 0
def hello_func():
 if(count == 5):
 return 0
 print("Hello")
 count+=1
 hello_func()

hello_func()

Error :

 UnboundLocalError: local variable 'count' referenced before assignment

Can you explain what I'm doing wrong? And how do I declare count has global variable without altering the structure of the above program?

asked Nov 11 '18 at 8:10

Maccen Wright

3311420

marked as duplicate by Community♦ Nov 11 '18 at 8:14

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:

How to change a variable after it is already defined?

6 answers

I gave this following program in Python just to understand scopes of variables, but I'm getting the error:

count = 0
def hello_func():
 if(count == 5):
 return 0
 print("Hello")
 count+=1
 hello_func()

hello_func()

Error :

 UnboundLocalError: local variable 'count' referenced before assignment

Can you explain what I'm doing wrong? And how do I declare count has global variable without altering the structure of the above program?

asked Nov 11 '18 at 8:10

Maccen Wright

3311420

marked as duplicate by Community♦ Nov 11 '18 at 8:14

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:

How to change a variable after it is already defined?

6 answers

I gave this following program in Python just to understand scopes of variables, but I'm getting the error:

count = 0
def hello_func():
 if(count == 5):
 return 0
 print("Hello")
 count+=1
 hello_func()

hello_func()

Error :

 UnboundLocalError: local variable 'count' referenced before assignment

Can you explain what I'm doing wrong? And how do I declare count has global variable without altering the structure of the above program?

asked Nov 11 '18 at 8:10

Maccen Wright

3311420

This question already has an answer here:

How to change a variable after it is already defined?

6 answers

I gave this following program in Python just to understand scopes of variables, but I'm getting the error:

count = 0
def hello_func():
 if(count == 5):
 return 0
 print("Hello")
 count+=1
 hello_func()

hello_func()

Error :

 UnboundLocalError: local variable 'count' referenced before assignment

Can you explain what I'm doing wrong? And how do I declare count has global variable without altering the structure of the above program?

This question already has an answer here:

How to change a variable after it is already defined?

6 answers

python

asked Nov 11 '18 at 8:10

Maccen Wright

3311420

asked Nov 11 '18 at 8:10

Maccen Wright

3311420

asked Nov 11 '18 at 8:10

Maccen Wright

3311420

asked Nov 11 '18 at 8:10

Maccen Wright

3311420

asked Nov 11 '18 at 8:10

Maccen Wright

3311420

marked as duplicate by Community♦ Nov 11 '18 at 8:14

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 Community♦ Nov 11 '18 at 8:14

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 |

1 Answer
1

active

oldest

votes

When using global variables within a function, you need to declare it explicitly:

count = 0
def hello_func():
 global count
 if(count == 5):
 return 0
 print("Hello")
 count+=1
 hello_func()

hello_func()

The global count in the third line declares I am using the global variable.

answered Nov 11 '18 at 8:13

Dinari

1,619522

add a comment |

1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

When using global variables within a function, you need to declare it explicitly:

count = 0
def hello_func():
 global count
 if(count == 5):
 return 0
 print("Hello")
 count+=1
 hello_func()

hello_func()

The global count in the third line declares I am using the global variable.

answered Nov 11 '18 at 8:13

Dinari

1,619522

add a comment |

When using global variables within a function, you need to declare it explicitly:

count = 0
def hello_func():
 global count
 if(count == 5):
 return 0
 print("Hello")
 count+=1
 hello_func()

hello_func()

The global count in the third line declares I am using the global variable.

answered Nov 11 '18 at 8:13

Dinari

1,619522

add a comment |

When using global variables within a function, you need to declare it explicitly:

count = 0
def hello_func():
 global count
 if(count == 5):
 return 0
 print("Hello")
 count+=1
 hello_func()

hello_func()

The global count in the third line declares I am using the global variable.

answered Nov 11 '18 at 8:13

Dinari

1,619522

When using global variables within a function, you need to declare it explicitly:

count = 0
def hello_func():
 global count
 if(count == 5):
 return 0
 print("Hello")
 count+=1
 hello_func()

hello_func()

The global count in the third line declares I am using the global variable.

answered Nov 11 '18 at 8:13

Dinari

1,619522

answered Nov 11 '18 at 8:13

Dinari

1,619522

answered Nov 11 '18 at 8:13

Dinari

1,619522

answered Nov 11 '18 at 8:13

Dinari

1,619522

add a comment |

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