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  1. #%% Importing Modules
  2.  
  3. import pandas as pd
  4.  
  5. #%% Sample DataFrame
  6.  
  7. df = pd.DataFrame({
  8.     'first_name': ['alice','bob','charlie','daisy'],
  9.     'last_name':['smith','jones','joneson','white'],
  10.     'age': [25,20,30,35]})
  11.  
  12. #%% Method 1 : Long and Slow
  13.  
  14. emptyList = []
  15.  
  16. for colName in df.columns.values: 
  17.  
  18.     emptyList2 = []
  19.  
  20.     for index, row in df.iterrows():
  21.  
  22.         if len(str(row[colName])) != None:
  23.             charLength = len(str(row[colName]))
  24.         else:
  25.             charLength = 0
  26.  
  27.         emptyList2.append(charLength)
  28.  
  29.     emptyList.append((colName,max(emptyList2)))
  30.  
  31.  
  32. maxChar = dict(emptyList)
  33.  
  34. #%% Method 1 : Short and Fast
  35.  
  36. maxChar = [(colName, df[colName].apply(lambda x: len(str(x)) if x!=None else 0).max())for colName in df.columns.values]
Success #stdin #stdout 0.52s 60508KB
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https://ideone.com/sVi95U
language:
Python 3 (python  3.12)
created:
4 years ago
visibility:
public

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