How to open three files in loop, in python

Question

How to open three files which have same sequence of data inside, and all these file data should run inside a loop. That loop will capture the values inside the file. First read first file data and then second file then third. How can make this work in my existing code...

def memberStatus():
 inputFile = open('Members.txt', 'r')
 inputFile = open('Members1.txt', 'r')
 inputFile = open('Members2.txt', 'r')
 with inputFile as myFile:
    for number, line in enumerate(myFile):
        line=(line.rstrip()).split()
        rawList=[]
        rawList.append(line)
        print("raw list : ", rawList)
        intLine1 = [str(elem) for elem in rawList]
        intLine1 = ''.join(intLine1)
        AgeItem = intLine1[2:4]
        winLoosItem = intLine1[8:9]
        logInItem = intLine1[13:16]
        GenderItem = intLine1[20:26]
        incomeItem = intLine1[30:33]

These're the three files which should run inside "with inputFile as myFile:" loop

Members.txt
Members1.txt
Members2.txt

Peter Nimroot · Accepted Answer · 2016-05-19 15:06:52Z

2

With doing that:

inputFile = open('Members.txt', 'r')
inputFile = open('Members1.txt', 'r')
inputFile = open('Members2.txt', 'r')

You simply reassign the inputFile name to other file each time.

One of many possible ways to go would be for example to put names of files to the list and then iterate through the list.

 inputFiles = ['Members.txt', 'Members1.txt', 'Members2.txt']
 for membersFile in inputFiles:
     myFile = open(membersFile, 'r')
     # And rest of code goes in here.
     myFile.close()

Edit: @SergeBallesta is right that you would normally rather use the with statement for operations on files as it's very convenient and simple to use and in this example it would like this:

 inputFiles = ['Members.txt', 'Members1.txt', 'Members2.txt']
 for membersFile in inputFiles:
     with open(membersFile, 'r') as myFile:
         # And rest of code goes in here.

One should probably decide on his own what seems more convenient for him and his/her eyes.

edited May 19, 2016 at 15:06

answered May 19, 2016 at 14:56

Peter Nimroot

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3 Comments

Serge Ballesta Over a year ago

with open(membersFile, 'r') as myFile: would at least ensure a clean close of each file between trying to process next...

Peter Nimroot Over a year ago

@SergeBallesta True, however all you have to do is use the close method at the end of iteration and with using the with statement you create additional indentation level and sacrificing readability imo is not really worth it in such simple case.

user1641688 Over a year ago

Thankyou @Peter Nimroot it's work.. and I'm feeling I'm so stupid that I didn't notice that simple solution. Thankyou

renefritze · Accepted Answer · 2016-05-19 14:57:33Z

2

def memberStatus():
  for name in ['Members.txt', 'Members1.txt', 'Members2.txt']:
    with open(name, 'r') as myFile:
      # do stuff

answered May 19, 2016 at 14:57

renefritze

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