Remove or replace spaces in column names

• To remove white spaces:

1. To remove white space everywhere:

df.columns = df.columns.str.replace(' ', '')

2. To remove white space at the beginning of string:

df.columns = df.columns.str.lstrip()

3. To remove white space at the end of string:

df.columns = df.columns.str.rstrip()

4. To remove white space at both ends:

df.columns = df.columns.str.strip()

• To replace white spaces with other characters (underscore for instance):

5. To replace white space everywhere

df.columns = df.columns.str.replace(' ', '_')

6. To replace white space at the beginning:

df.columns = df.columns.str.replace('^ +', '_')

7. To replace white space at the end:

df.columns = df.columns.str.replace(' +$', '_')

8. To replace white space at both ends:

df.columns = df.columns.str.replace('^ +| +$', '_')

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All above applies to a specific column as well, assume you have a column named col, then just do:

df[col] = df[col].str.strip()  # or .replace as above

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Commands can be chained

df.columns = df.columns.str.strip().str.replace(' ', '_')