How to Select the First n Columns of a Pandas DataFrame [All Method]️
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It’s also a question How to Select the First n Columns of a Pandas DataFrame? What should you do if you come across a code error! Let’s get started on fixing it.
Question: What is the best solution for this problem? Answer: This blog code can help you solve errors How to Select the First n Columns of a Pandas DataFrame. Question: What is causing this error and what can be done to fix it? Answer: Check out this blog for a solution to your problem.
How can we select the first n columns of a Pandas DataFrame?
Suppose we have this DataFrame df.
x1 x2 x3 x4 y
0 7 143 22 23 1
1 1 23 22 29 0
2 3 133 24 0 1
3 1 39 27 23 0
4 0 137 40 23 1
If we only want the first 4 columns, then we can either slice by the actual index, or use -1.
df.iloc[:,:4]
df.iloc[:,:-1]
If we only want the last column (index of 4), once again, we can either slice by the actual index, or use -1.
df.iloc[:,4:]
df.iloc[:,-1:]
Revise the code and make it more robust with proper test case and check an error there before implementing into a production environment.
Now you can solve your code error in less than a minute.
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