I am trying to take an input from user and search for the string from a file and then print the line. When I try to execute I keep getting this error. My code is
file = open("file.txt", 'r')
data = file.read()
zinput = str(input("Enter the word you want me to search: "))
for zinput in data:
line = data.readline()
print (line)
There are many things to improve in your code.
data is a string, and str has no attribute readline(). read will read the whole content from file. Don't do this.break the loop once you find zinput.The algorithm is really simple:
1) file object is an iterable, read it line by line.
2) If a line contains your zinput, print it.
Code:
file = open("file.txt", 'r')
zinput = str(input("Enter the word you want me to search: "))
for line in file:
if zinput in line:
print line
break
file.close()
Optionally, you can use with to make things easier and shorter. It will close the file for you.
Code:
zinput = str(input("Enter the word you want me to search: "))
with open("file.txt", 'r') as file:
for line in file:
if zinput in line:
print line
break
withOne of the issues looks to be with calling readline() on the data that is returned from your opened file. Another way to approach this would be:
flag = True
zInput = ""
while flag:
zInput = str(raw_input("Enter the word you want me to search: "))
if len(zInput) > 0:
flag = False
else:
print("Not a valid input, please try again")
with open("file.txt", 'r') as fileObj:
fileString = fileObj.read()
if len(fileString) > 0 and fileString == zInput:
print("You have found a matching phrase")
One thing that I forgot to mention is that I tested this code with Python 2.7 and it looks like you are using Python 3.* because of the use of input() and not raw_input() for STDIN.
In your example, please use:
zInput = str(input("Enter the word you want me to search: "))
For Python 3.*
read()from file and then usingreadline()in loop which basically overwrites the user input.zinputfrom the input call with every line in the data.