在python中，我需要打印；“没有结果”；如果没有找到

在搜索python文件时，如果没有找到结果，我需要能够打印“无结果”

**strong text**elif x.upper()=="Y":
    k=input("Enter the 1st letter of the name (upper-Case):")
    y=open("Names.txt","r")
    for i in y.readlines():
        if k.upper() in i:
            print (i[:-1])
        #need option if no search results are found

您可以一次搜索整个文件。不是最好的性能，但足够简单。这是为了尽量减少对代码的更改。我会：

**strong text**elif x.upper()=="Y":
    k=input("Enter the 1st letter of the name (upper-Case):")
    y=open("Names.txt","r")
    all_text = y.read()
    for i in all_text.splitlines():
        if k.upper() in i:
            print (i) # don't need [:-1] anymore
        #need option if no search results are found
    found_f = k.upper() in all_text

---

那就去做吧。什么阻止了您？如果找到（在

if

中，类似于

found=True

），并且如果标记为false，则在

for

之外打印“无结果”，另一个选项是在for循环中添加一个else子句，并在print语句之后中断（仅当需要一个搜索结果时）。

**strong text**elif x.upper()=="Y":
    k=input("Enter the 1st letter of the name (upper-Case):")
    y=open("Names.txt","r")
    all_lines = y.readlines()
    for i in all_lines:
        if k.upper() in i:
            print (i[:-1])
        #need option if no search results are found
    found_f = k.upper() in ''.join(all_lines)

**strong text**elif x.upper()=="Y":
    k=input("Enter the 1st letter of the name (upper-Case):")
    y=open("Names.txt","r")
    all_text = y.read()
    for i in all_text.splitlines():
        if k.upper() in i:
            print (i) # don't need [:-1] anymore
        #need option if no search results are found
    found_f = k.upper() in all_text