Check whether string is in CSV

Question

I want to search a CSV file and print either True or False, depending on whether or not I found the string. However, I\'m running into the problem wher

Answer 1

when you look inside a csv file using the csv module, it will return each row as a list of columns. So if you want to lookup your string, you should modify your code as such:

import csv

username = input()

with open('Users.csv', 'rt') as f:
     reader = csv.reader(f, delimiter=',') # good point by @paco
     for row in reader:
          for field in row:
              if field == username:
                  print "is in file"

but as it is a csv file, you might expect the username to be at a given column:

with open('Users.csv', 'rt') as f:
     reader = csv.reader(f, delimiter=',')
     for row in reader:
          if username == row[2]: # if the username shall be on column 3 (-> index 2)
              print "is in file"

Answer 2

import csv
scoresList=[]
with open ("playerScores_v2.txt") as csvfile:
           scores=csv.reader(csvfile, delimiter= ",")
           for row in scores:
              scoresList.append(row)


playername=input("Enter the player name you would like the score for:")
print("{0:40} {1:10} {2:10}".format("Name","Level","Score"))

for i in range(0,len(scoresList)):
   print("{0:40} {1:10} {2:10}".format(scoresList[i] [0],scoresList[i] [1], scoresList[i] [2]))

Answer 3

You should have a look at the csv module in python.

is_in_file = False
with open('my_file.csv', 'rb') as csvfile:
    my_content = csv.reader(csvfile, delimiter=',')
    for row in my_content:
        if username in row:
            is_in_file = True
print is_in_file

It assumes that your delimiter is a comma (replace with the your delimiter. Note that username must be defined previously. Also change the name of the file. The code loops through all the lines in the CSV file. row a list of string containing each element of your row. For example, if you have this in your CSV file: Joe,Peter,Michel the row will be ['Joe', 'Peter', 'Michel']. Then you can check if your username is in that list.

Answer 4

#!/usr/bin/python
import csv

with open('my.csv', 'r') as f:
    lines = f.readlines()
    cnt = 0

    for entry in lines:
        if 'foo' in entry:
            cnt += 1

    print"No of foo entry Count :".ljust(20, '.'), cnt