从文件中检索数据

Question

下面是程序一部分的代码。 此部分打印用户输入的行（与idnum相同）。 它可以很好地从所有6个文件中检索数据，但是在打印它们时，每行数据之间存在一行分隔线。 我需要做些什么才能使程序打印没有行距的数据。

1 smith

1 john

1 02/01/1234

1 4 pigeon street

1 123456765432234432

1 male

idnum= int(input("Enter id number: "))

def display():
    line = open("Surname", "r").readlines()[idnum-1]
    print (line)
    line = open("Forename", "r").readlines()[idnum-1]
    print (line)
    line = open("Date of birth", "r").readlines()[idnum-1]
    print (line)
    line = open("Home address", "r").readlines()[idnum-1]
    print (line)
    line = open("Home phone number", "r").readlines()[idnum-1]
    print (line)
    line = open("Gender", "r").readlines()[idnum-1]
    print (line)



import os.path
if os.path.exists("Surname"):
    display()
else:
    print("No data exists.")

Answer 1

您可以指定end in print功能（默认值可能是'\\ n'。我也压缩了您的代码。

from os import path

idnum= int(input("Enter id number: "))

def display():
    for file in ["Surname", "Forename", "Date of birth", "Home address", "Home phone number", "Gender"]:
        with open(file) as f:
            print(f.readlines()[idnum-1], end=' ')

if os.path.exists("Surname"):
    display()
else:
    print("No data exists.")

Answer 2

您的readlines()正在从文件中拾取换行符。 要读取不带\\n字符的内容，请遵循此问题的建议，并改用read().splitlines() ：

import os

idnum= int(input("Enter id number: "))

def display():
    for file in ["Surname", "Forename", "Date of birth", "Home address", "Home phone number", "Gender"]:
        with open(file) as f:
            print(f.read().splitlines()[idnum-1])

if os.path.exists("Surname"):
    display()
else:
    print("No data exists.")