Replacing column value of a CSV file in Python

# reading the CSV file
text = open("csvfile.csv", "r")
#join() method combines all contents of 
# csvfile.csv and formed as a string
text = ''.join([i for i in text]) 
# search and replace the contents
text = text.replace("EmployeeName", "EmpName") 
text = text.replace("EmployeeNumber", "EmpNumber") 
text = text.replace("EmployeeDepartment", "EmpDepartment") 
text = text.replace("lined", "linked") 
# output.csv is the output file opened in write mode
x = open("output.csv","w")
# all the replaced text is written in the output.csv file
x.writelines(text)
x.close()

# importing the module
import pandas as pd 
  
# making data frame from the csv file 
dataframe = pd.read_csv("csvfile1.csv") 
  
# using the replace() method
dataframe.replace(to_replace ="Fashion", 
                 value = "Fashion industry", 
                  inplace = True)
dataframe.replace(to_replace ="Food", 
                 value = "Food Industry", 
                  inplace = True)
dataframe.replace(to_replace ="IT", 
                 value = "IT Industry", 
                  inplace = True)
# writing  the dataframe to another csv file
dataframe.to_csv('outputfile.csv', 
                 index = False)