我正在尝试编写 python 脚本以在文件中查找超过 1000 行的字符串，并在该字符串匹配后删除几行 (10)

Question

Below fastfile (more than 1000 lines) I would like to search for string "Validate repo test2" and delete lines starting from "Validate repo test2" upto string "end" and rewrite content to new file.

Fastfile

desc "Validate repo test1"
lane :validate_repo do
lint_source
execute_tests
validate_docs
ensure_tool_name_formatting
ensure_code_samples
ensure_special_docs_code_samples
ensure_code_snippets
ensure_actions_config_items_formatting
end

desc "Validate repo test2"
lane :validate_repo do
lint_source
execute_tests
validate_docs
ensure_tool_name_formatting
ensure_code_samples
ensure_special_docs_code_samples
ensure_code_snippets
ensure_actions_config_items_formatting
end

desc "Validate repo test3"
lane :validate_repo do
lint_source
execute_tests
validate_docs
ensure_tool_name_formatting
ensure_code_samples
ensure_special_docs_code_samples
ensure_code_snippets
ensure_actions_config_items_formatting
end

Answer 1

You could do something like this:

with open('Fastfile', 'r') as f_orig, open('Fastfile_new', 'w') as f_new:
    skipping = False
    for line in f_orig:
        if 'Validate repo test2' in line:
            skipping = True
        if not skipping:
            f_new.write(line)
        if line[:3] == 'end':
            skipping = False

Answer 2

Maybe there are many solutions, but I think the follow codes can solve your problem too.

need_delete = False
with open(path_to_old_file, 'r') as fin, open(path_to_new_file, 'w+') as fout :
    for line in fin:
        if line.endswith('"Validate repo test2"\n'):
            need_delete = True
        if need_delete and not line.strip():
            need_delete = False
            continue
        if not need_delete:
            fout.write(line)

I hope this will help you.

Answer 3

I'm new to this, so I'm not sure how to credit the author, but this was useful to me: Regex Match all characters between two strings Thanks @zx81

You can use the regex:

(?s)(?<="Validate repo test[\d]*").*(?=end)

http://www.rexegg.com/regex-modifiers.html#dotall The first section will enable "dot all mode", the rest of the regex says "Selects all characters between ""Validate repo test[\\d]*"" and "end"". From there you can use regex sub to remove all of them. All together it would look a bit like this:

import re

fileText = file.read()
regex = re.compile(r"\"Validate repo test[\d]*\"", re.DOTALL)
result = re.sub(regex, "", fileText)

file.write(result)