如何在文本文件中搜索特定列以获取用户输入

Question

I want to be able to ask the user for a string that they would like to search for in a specific column. Its the second column in a tab delimited text file, and find and print every instance where it occurs in that column.

I want the user to be able to just enter even a snippet of the item, doesn't matter uppercase or lowercase, and get the full items back. In this case the second column contains a list of authors and I want the user to be able to search for an author and return the name of the author and the name of the book they've written, which is in the same line, but is in the first column.

def file_search():
    userInput = input('Enter a string: ')
    lowerInput = userInput.lower()
    f=open('file.txt','r')
    lowerInput=f.readlines()
    result=[]
    for x in lowerInput:
        result.append(x.split(' ')[1])
    f.close()

This is what I've tried but my 'list index is out of range' A line looks like

A Widow For One Year    John Irving     Random House    6/14/1998   Fiction
Accident    Danielle Steel  Delacorte   2/27/1994   Fiction
Acheron     Sherrilyn Kenyon    St. Martin's    8/24/2008   Fiction
Advise and Consent      Allen Drury    Doubleday    10/4/1959   Fiction
Against All Enemies    Tom Clancy   Putnam   7/3/2011   Fiction
Airframe    Michael Crichton    Knopf   12/29/1996  Fiction
Airport    Arthur Hailey    Doubleday   4/7/1968    Fiction

Answer 1

I have modified your code a little bit but it should definitely get you going. If for example you enter "john" you'll find everything about his work.

def file_search():
    userInput = input('Enter a string: ').lower()
    result = []
    with open("file.txt", 'r') as f:
        for x in f:
            if userInput in x.lower():
                result.append(x.split('   '))

    for s in result:
        print(s[1] + " has written: "+ s[0])

file_search()