/Python/Fastest way to Convert Integers to Strings in Pandas DataFrame

Fastest way to Convert Integers to Strings in Pandas DataFrame

import pandas as pd
import sys
import time
import numpy as np
  
print('Version Of Python: ' + sys.version)
print('Version Of Pandas: ' + pd.__version__)
print('Version Of Numpy: ' + np.version.version)
  
frame1 = pd.DataFrame(np.random.randint(0, 90, size =(5000000, 1)), columns =['random'])
frame2 = pd.DataFrame(np.random.randint(0, 90, size =(5000000, 1)), columns =['random'])
frame3 = pd.DataFrame(np.random.randint(0, 90, size =(5000000, 1)), columns =['random'])
frame4 = pd.DataFrame(np.random.randint(0, 90, size =(5000000, 1)), columns =['random'])
  
  
# Using map(str) method
t1 = time.time()
frame1['random'] = frame1['random'].map(str)
output1 = (time.time() - t1)  
print('Time taken in seconds using map(str): ' + str(output1))
  
# Using apply(str) method
t2 = time.time()
frame2['random'] = frame2['random'].apply(str)
output2 = (time.time() - t2)  
print('Time taken in seconds using apply(str): ' + str(output2))
  
# Using astype(str) method
t3 = time.time()
frame3['random'] = frame3['random'].astype(str)
output3 = (time.time() - t3)  
print('Time taken in seconds using astype(str): ' + str(output3))
  
# Using values.astype(str) method
t4 = time.time()
frame4['random'] = frame4['random'].values.astype(str)
output4 = (time.time() - t4)  
print('Time taken in seconds using values.astype(str): ' + str(output4))
  
l =[output1, output2, output3, output4]
m =['map(str)', 'apply(str)', 'astype(str)', 'values.astype(str)']
  
# Fastest way to convert into string
minimum = min(l)
k = l.index(minimum)
fastest = m[k]
  
# It will print the fastest conversion method.
print(fastest+" is the fastest method")

Source: geeksforgeeks.org

Similar codes

0 vote191 views1 answer
Django or
Python Django
1 vote199 views1 answer
Get current site django
Python
3 votes199 views1 answer
Matplotlib text too small
Python
0 vote193 views1 answer
Import CreateAPIView django
Python Django
1 vote174 views1 answer
Python returen Thread
Python
0 vote178 views1 answer
Untrack local changes
Python
0 vote164 views2 answers
Feature selection python
Python
0 vote192 views1 answer
How remove name of index pandas
Python
0 vote177 views1 answer
Pandas snippets
Python
1 vote175 views2 answers
Right angle triangle in python
Python