Changing column names from dataframe
Question:
I have a dataframe with all the companies listed in the S&P500 with their daily data. However in each dataframe column name there is an undesired "/n"
appended to it and I want to remove it.
I get the following error:
df.columns = df.columns.str.replace('*.n.*', '')
File "C:Python37libsite-packagespandascorestrings.py", line 1843, in wrapper
return func(self, *args, **kwargs)
File "C:Python37libsite-packagespandascorestrings.py", line 2716, in replace
self._parent, pat, repl, n=n, case=case, flags=flags, regex=regex
File "C:Python37libsite-packagespandascorestrings.py", line 619, in str_replace
compiled = re.compile(pat, flags=flags)
File "C:Python37libre.py", line 234, in compile
return _compile(pattern, flags)
File "C:Python37libre.py", line 286, in _compile
p = sre_compile.compile(pattern, flags)
File "C:Python37libsre_compile.py", line 764, in compile
p = sre_parse.parse(p, flags)
File "C:Python37libsre_parse.py", line 930, in parse
p = _parse_sub(source, pattern, flags & SRE_FLAG_VERBOSE, 0)
File "C:Python37libsre_parse.py", line 426, in _parse_sub
not nested and not items))
File "C:Python37libsre_parse.py", line 651, in _parse
source.tell() - here + len(this))
re.error: nothing to repeat at position 0 (line 1, column 1)
This is the function causing the error:
def remove_extra_characters(df):
df.columns = df.columns.str.replace('*.n.*', '')
Answers:
Here you go! New-lines be gone! 🙂
import pandas as pd
data = [['tom', 10], ['nick', 15], ['juli', 14]]
df = pd.DataFrame(data, columns=['Namennn', 'Agenn'])
df.rename(columns={old:old.strip() for old in df.columns}, inplace=True)
print(df)
I have a dataframe with all the companies listed in the S&P500 with their daily data. However in each dataframe column name there is an undesired "/n"
appended to it and I want to remove it.
I get the following error:
df.columns = df.columns.str.replace('*.n.*', '')
File "C:Python37libsite-packagespandascorestrings.py", line 1843, in wrapper
return func(self, *args, **kwargs)
File "C:Python37libsite-packagespandascorestrings.py", line 2716, in replace
self._parent, pat, repl, n=n, case=case, flags=flags, regex=regex
File "C:Python37libsite-packagespandascorestrings.py", line 619, in str_replace
compiled = re.compile(pat, flags=flags)
File "C:Python37libre.py", line 234, in compile
return _compile(pattern, flags)
File "C:Python37libre.py", line 286, in _compile
p = sre_compile.compile(pattern, flags)
File "C:Python37libsre_compile.py", line 764, in compile
p = sre_parse.parse(p, flags)
File "C:Python37libsre_parse.py", line 930, in parse
p = _parse_sub(source, pattern, flags & SRE_FLAG_VERBOSE, 0)
File "C:Python37libsre_parse.py", line 426, in _parse_sub
not nested and not items))
File "C:Python37libsre_parse.py", line 651, in _parse
source.tell() - here + len(this))
re.error: nothing to repeat at position 0 (line 1, column 1)
This is the function causing the error:
def remove_extra_characters(df):
df.columns = df.columns.str.replace('*.n.*', '')
Here you go! New-lines be gone! 🙂
import pandas as pd
data = [['tom', 10], ['nick', 15], ['juli', 14]]
df = pd.DataFrame(data, columns=['Namennn', 'Agenn'])
df.rename(columns={old:old.strip() for old in df.columns}, inplace=True)
print(df)