Question

我有以下测试文件

testfile1输出：

   put returns between paragraphs
   for linebreak add 2 spaces at end
   indent code by 4 spaces
   #commented out

testfile2输出：

import difflib

with open('testfile1') as text1, open('testfile2') as text2:
    diff = difflib.ndiff(text1.readlines(), text2.readlines())
with open('diff.txt', 'w') as result:
    for line in diff:
        result.write(line)

我想比较两个文件并仅打印差异输出。如果行开头的任何注释忽略比较那些行。

以下是我尝试的代码：

 put returns between paragraphs
 for linebreak add 2 spaces at end
 indent code by 4 spaces
+ #commented

输出：

 put returns between paragraphs
 for linebreak add 2 spaces at end
 indent code by 4 spaces

预期产出：

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic,retain) UILabel *mylabel;
@property (nonatomic,retain) UIButton *myButton;

@end

@implementation ViewController

@synthesize mylabel,myButton;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    mylabel = [[UILabel alloc]initWithFrame:CGRectMake(0, self.view.frame.size.height*0.11, self.view.frame.size.width, 30)];
    mylabel.translatesAutoresizingMaskIntoConstraints=false;
    [mylabel setTextAlignment:NSTextAlignmentCenter];
    mylabel.text = @"Button Not Pressed";
    [self.view addSubview:mylabel];

    myButton = [[UIButton alloc]initWithFrame:CGRectMake(0, self.view.frame.size.height*0.13, self.view.frame.size.width, 50)];
    myButton.translatesAutoresizingMaskIntoConstraints=false;
    [myButton setTitle:@"Button" forState:UIControlStateNormal];
    [myButton setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
    [myButton addTarget:self action:@selector(buttonHandler:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:myButton];


}

-(void) buttonHandler:(UIButton*)sender{
    mylabel.text = @"ButtonPressed";
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end

并打印＆＃34;无变化＆＃34;

Answer 1

我会使用列表解析消除# - 标记的行：

...
with open('testfile1') as text1, open('testfile2') as text2:
    diff = difflib.ndiff(
        [line for line in text1 if not line.startswith('#')],
        [line for line in text2 if not line.startswith('#')]
        )
...

比较python中的两个文件忽略比较注释行

1 个答案: