How do I solve the indentation error in Python

Question

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for i,row in train_df.iterrows():
     if row['Age']>0 and row['Age']<=10:
            if row['Pclass']==1 :
                sp11=sp11+row['Survived']
                cp11=cp11+1
            elif row['Pclass']==2:
                sp12=sp12+row['Survived']
                cp12=cp12+1
            else:
                sp13=sp13+row['Survived']
                cp13=cp13+1
    if row['Age']>10 and row['Age']<=20:
            if row['Pclass']==1 :
                sp21=sp21+row['Survived']
                cp21=cp21+1
            elif row['Pclass']==2:
                sp22=sp22+row['Survived']
                cp22=cp22+1
            else:
                sp23=sp23+row['Survived']
                cp23=cp23+1
                
    if row['Age']>20 and row['Age']<=30:
            if row['Pclass']==1 :
                sp31=sp31+row['Survived']
                cp31=cp31+1
            elif row['Pclass']==2:
                sp32=sp32+row['Survived']
                cp32=cp32+1
            else:
                sp33=sp33+row['Survived']
                cp33=cp33+1
    if row['Age']>30 and row['Age']<=40:
            if row['Pclass']==1 :
                sp41=sp41+row['Survived']
                cp41=cp41+1
            elif row['Pclass']==2:
                sp42=sp42+row['Survived']
                cp42=cp42+1
            else:
                sp43=sp43+row['Survived']
                cp43=cp43+1
                
    if row['Age']>40 and row['Age']<=50:
            if row['Pclass']==1 :
                sp51=sp51+row['Survived']
                cp51=cp51+1
            elif row['Pclass']==2:
                sp52=sp52+row['Survived']
                cp52=cp52+1
            else:
                sp13=sp13+row['Survived']
                cp13=cp13+1
    if row['Age']>50 and row['Age']<=60:
            if row['Pclass']==1 :
                sp61=sp61+row['Survived']
                cp61=cp61+1
            elif row['Pclass']==2:
                sp62=sp62+row['Survived']
                cp62=cp62+1
            else:
                sp63=sp63+row['Survived']
                cp63=cp63+1

What I have tried:

I tried adjusting the spacing but I am getting the following error again and again.

Output:

File "<tokenize>", line 65
    if row['Age']>10 and row['Age']<=20:
    ^
IndentationError: unindent does not match any outer indentation level

Posted 13-Aug-19 2:18am

Member 14557966

Updated 15-Jan-20 2:05am

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3 solutions

Solution 3

Code with proper indentation

Python

for i,row in train_df.iterrows():
	if row['Age']>0 and row['Age']<=10:
		if row['Pclass']==1 :
			sp11=sp11+row['Survived']
			cp11=cp11+1
		elif row['Pclass']==2:
			sp12=sp12+row['Survived']
			cp12=cp12+1
		else:
			sp13=sp13+row['Survived']
			cp13=cp13+1
	if row['Age']>10 and row['Age']<=20:
		if row['Pclass']==1 :
			sp21=sp21+row['Survived']
			cp21=cp21+1
		elif row['Pclass']==2:
			sp22=sp22+row['Survived']
			cp22=cp22+1
		else:
			sp23=sp23+row['Survived']
			cp23=cp23+1

	if row['Age']>20 and row['Age']<=30:
		if row['Pclass']==1 :
			sp31=sp31+row['Survived']
			cp31=cp31+1
		elif row['Pclass']==2:
			sp32=sp32+row['Survived']
			cp32=cp32+1
		else:
			sp33=sp33+row['Survived']
			cp33=cp33+1
	if row['Age']>30 and row['Age']<=40:
		if row['Pclass']==1 :
			sp41=sp41+row['Survived']
			cp41=cp41+1
		elif row['Pclass']==2:
			sp42=sp42+row['Survived']
			cp42=cp42+1
		else:
			sp43=sp43+row['Survived']
			cp43=cp43+1

	if row['Age']>40 and row['Age']<=50:
		if row['Pclass']==1 :
			sp51=sp51+row['Survived']
			cp51=cp51+1
		elif row['Pclass']==2:
			sp52=sp52+row['Survived']
			cp52=cp52+1
		else:
			sp13=sp13+row['Survived']
			cp13=cp13+1
	if row['Age']>50 and row['Age']<=60:
		if row['Pclass']==1 :
			sp61=sp61+row['Survived']
			cp61=cp61+1
		elif row['Pclass']==2:
			sp62=sp62+row['Survived']
			cp62=cp62+1
		else:
			sp63=sp63+row['Survived']
			cp63=cp63+1

Posted 15-Jan-20 2:06am

shailesh singh Visen

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Patrice T · Accepted Answer · 2019-08-13T04:04:00

Quote:
I tried adjusting the spacing but I am getting the following error again and again.

The problem is the number of spaces

Python

for i,row in train_df.iterrows():        # in this loop
     if row['Age']>0 and row['Age']<=10: # the first inner statement is indented with 5 spaces
            if row['Pclass']==1 :
                sp11=sp11+row['Survived']
                cp11=cp11+1
            elif row['Pclass']==2:
                sp12=sp12+row['Survived']
                cp12=cp12+1
            else:
                sp13=sp13+row['Survived']
                cp13=cp13+1
    if row['Age']>10 and row['Age']<=20:  # but the second is indented with 4 spaces

but anything inside the loop must have the same indentation.

OriginalGriff · Accepted Answer · 2019-08-13T02:33:00

Check the code really carefully: they may be spaces and tabs in there, so the indentation looks right, but doesn't actually match.
Editors can work with tabs, which are "seen" as spaces at intervals defined by the editor (and frequently variable in the app settings)
If the indentation the editor is showing you does not match what python expects then teh indentation levels will not match and you will get this error.

Check your editor, and see if it can "show marks" which may help you find tab characters, or convert tabs to spaces which means the output should always match what you see on teh screen.

How do I solve the indentation error in Python

3 solutions

Solution 2

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Solution 3

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