fix: Use raw string to avoid invalid sequence errors

Escaped when proven easier

frappe/translate.py

@@ -589,7 +589,7 @@ def is_translatable(m):
 def add_line_number(messages, code):
 	ret = []
 	messages = sorted(messages, key=lambda x: x[0])
-	newlines = [m.start() for m in re.compile('\\n').finditer(code)]
+	newlines = [m.start() for m in re.compile(r'\n').finditer(code)]
 	line = 1
 	newline_i = 0
 	for pos, message, context in messages:

frappe/utils/__init__.py

@@ -151,7 +151,7 @@ def split_emails(txt):
 
 	# emails can be separated by comma or newline
 	s = re.sub(r'[\t\n\r]', ' ', cstr(txt))
-	for email in re.split('''[,\\n](?=(?:[^"]|"[^"]*")*$)''', s):
+	for email in re.split(r'[,\n](?=(?:[^"]|"[^"]*")*$)', s):
 		email = strip(cstr(email))
 		if email:
 			email_list.append(email)

frappe/utils/data.py

@@ -454,7 +454,7 @@ def duration_to_seconds(duration):
 
 def validate_duration_format(duration):
 	import re
-	is_valid_duration = re.match("^(?:(\d+d)?((^|\s)\d+h)?((^|\s)\d+m)?((^|\s)\d+s)?)$", duration)
+	is_valid_duration = re.match(r"^(?:(\d+d)?((^|\s)\d+h)?((^|\s)\d+m)?((^|\s)\d+s)?)$", duration)
 	if not is_valid_duration:
 		frappe.throw(frappe._("Value {0} must be in the valid duration format: d h m s").format(frappe.bold(duration)))
 
@@ -1341,10 +1341,10 @@ def expand_relative_urls(html):
 
 		return "".join(to_expand)
 
-	html = re.sub('(href|src){1}([\s]*=[\s]*[\'"]?)((?!http)[^\'" >]+)([\'"]?)', _expand_relative_urls, html)
+	html = re.sub(r'(href|src){1}([\s]*=[\s]*[\'"]?)((?!http)[^\'" >]+)([\'"]?)', _expand_relative_urls, html)
 
 	# background-image: url('/assets/...')
-	html = re.sub('(:[\s]?url)(\([\'"]?)((?!http)[^\'" >]+)([\'"]?\))', _expand_relative_urls, html)
+	html = re.sub(r'(:[\s]?url)(\([\'"]?)((?!http)[^\'" >]+)([\'"]?\))', _expand_relative_urls, html)
 	return html
 
 def quoted(url):
@@ -1355,7 +1355,7 @@ def quote_urls(html):
 		groups = list(match.groups())
 		groups[2] = quoted(groups[2])
 		return "".join(groups)
-	return re.sub('(href|src){1}([\s]*=[\s]*[\'"]?)((?:http)[^\'">]+)([\'"]?)',
+	return re.sub(r'(href|src){1}([\s]*=[\s]*[\'"]?)((?:http)[^\'">]+)([\'"]?)',
 		_quote_url, html)
 
 def unique(seq):