如果 txt 文件的行以另一個 txt 文件中的數字開頭 python

Question

with open('D:\Scripting Test/Full Data.txt') as f:
 for line in f:
   with open('D:\Scripting Test/Numbers.txt') as ff:
     for linee in ff:
       if line.startswith(linee):
           print(line)

我想打印文件（full-data.txt）中的所有行，如果它們以文件（numbers.txt）中的任何數字開頭

完整數據.txt：

4/0/0        
3/0/7        
4/0/7        
4/0/3        
4/0/4        
4/0/1        
3/0/5        
3/0/1        
2/0/5        
2/0/3        
2/0/4        
2/0/6        
3/0/2        
1/0/3        
6/0/6        
6/0/12       
1/0/5        
1/0/4        
3/0/4        

數字.txt：

1 

2 

5 

8

output 應該是：

2/0/5        
2/0/3        
2/0/4        
2/0/6

1/0/3

1/0/5        
1/0/4

Answer 1

您的問題是，當您閱讀某些數字時，它們包含空格，例如換行符和空格。 因此，首先嘗試將所有數字讀入一個數組並去除所有空格：

nums = []
with open('D:\\Scripting Test\\Numbers.txt') as f:
    nums = f.read().split('\n')
    nums = [n.strip() for n in nums if n != ''] # strip whitespace and get rid of empty lines

with open('D:\\Scripting Test\\Full Data.txt') as f:
    for line in f:
        for num in nums:
            if line.startswith(num):
                print(line)