CSV 如果/否则无法正常工作 Python

Question

这是包含 id、姓名、作者、主题和发布日期的 csv 文件示例内容。

2105001,Engineering Mechanics,Bela Imre Sandor,Engineering Mechanics,1983
2105002,Statics and Mechanics of Materials (2nd Edition),"William F. Riley, Leroy D. Sturges, Don H. Morris",Engineering Mechanics,2001
2105003,A Concise Introduction to Mechanics of Rigid Bodies,Loulin Huang,Engineering Mechanics,2011
2105004,Dynamics of Particles and Rigid Bodies,Mohammed F. Daqaq,Engineering Mechanics,2018
2105005,Engineering Sciences,Marcialito Modina Valenzona,Science,2002

这是代码。 问题是即使有匹配的结果，代码也会不断转向“else”，因为某些行不匹配。

1. 就像如果该行包含关键字 = 打印那些结果并忽略那些不匹配的结果。
2. 如果没有其他匹配，则转向其他。

def linear_search_name():
  bookname=input("Enter Title of the Book: ")
  bookfile=csv.reader(open("books.csv", "r"))
  for row in bookfile:
    if bookname.casefold() in row[1].casefold():
     print("ID:", row[0],"\n", row[1],"\n",row[2],"\n",row[3],"\n",row[4],"\n")
    else:
      print("try again")
      linear_search_name()

菜鸟问题，但我希望有人可以提供帮助。 非常感谢！！

Answer 1

代码片段应该适合您：

import csv
def linear_search_name():
    bookname=input("Enter Title of the Book: ")
    bookfile=csv.reader(open("copilot-test/stack3.csv", "r"))
    match_flag = False
    for row in bookfile:
        if bookname.casefold() in row[1].casefold():
            print("ID:", row[0],"\n", row[1],"\n",row[2],"\n",row[3],"\n",row[4],"\n")
            match_flag = True
    else:
        if not match_flag:
            print("try again")
            linear_search_name()
    
linear_search_name()