/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 vote187 views1 answer
Serversocket.accept() python
Python
1 vote190 views1 answer
Os.startfile
Python
1 vote194 views1 answer
Dataframe KeyError:
Python
0 vote210 views1 answer
What does features = data.drop(["Survived", "Sex", "Embarked"], axis=1) do in python
Python
1 vote264 views1 answer
How get 1st column in all rows of a 2d matrix in python
Python
0 vote192 views1 answer
How to put my graph in tkinter interface
Python
3 votes180 views1 answer
Delete a key value pair from a dictionary in python
Python
1 vote196 views3 answers
Does tuple allow duplicate values in python
Python
0 vote219 views1 answer
Django python base 64 decode
Python Django
10 votes187 views3 answers
Get reactions from message discord.py
Python