Since this thing is on the innerwebs I suppose it should have a

[python_utils.git] / string_utils.py

diff --git a/string_utils.py b/string_utils.py
index 4bec031738e989d10507992387e18aa47996da8e..08995765411a22bf5272bdae4bdee41b20312bc0 100644 (file)
--- a/string_utils.py
+++ b/string_utils.py
@@ -971,6 +971,10 @@ def shuffle(in_str: str) -> str:
     return from_char_list(chars)
 
 
+def scramble(in_str: str) -> str:
+    return shuffle(in_str)
+
+
 def strip_html(in_str: str, keep_tag_content: bool = False) -> str:
     """
     Remove html code contained into the given string.
@@ -1218,6 +1222,22 @@ def sprintf(*args, **kwargs) -> str:
     return ret
 
 
+def strip_ansi_sequences(in_str: str) -> str:
+    """Strips ANSI sequences out of strings.
+
+    >>> import ansi as a
+    >>> s = a.fg('blue') + 'blue!' + a.reset()
+    >>> len(s)   # '\x1b[38;5;21mblue!\x1b[m'
+    18
+    >>> len(strip_ansi_sequences(s))
+    5
+    >>> strip_ansi_sequences(s)
+    'blue!'
+
+    """
+    return re.sub(r'\x1b\[[\d+;]*[a-z]', '', in_str)
+
+
 class SprintfStdout(contextlib.AbstractContextManager):
     """
     A context manager that captures outputs to stdout.
@@ -1649,7 +1669,7 @@ def ip_v4_sort_key(txt: str) -> Optional[Tuple[int, ...]]:
     if not is_ip_v4(txt):
         print(f"not IP: {txt}")
         return None
-    return tuple([int(x) for x in txt.split('.')])
+    return tuple(int(x) for x in txt.split('.'))
 
 
 def path_ancestors_before_descendants_sort_key(volume: str) -> Tuple[str, ...]:
@@ -1664,7 +1684,7 @@ def path_ancestors_before_descendants_sort_key(volume: str) -> Tuple[str, ...]:
     ['/usr', '/usr/local', '/usr/local/bin']
 
     """
-    return tuple([x for x in volume.split('/') if len(x) > 0])
+    return tuple(x for x in volume.split('/') if len(x) > 0)
 
 
 def replace_all(in_str: str, replace_set: str, replacement: str) -> str:
@@ -1680,6 +1700,20 @@ def replace_all(in_str: str, replace_set: str, replacement: str) -> str:
     return in_str
 
 
+def replace_nth(in_str: str, source: str, target: str, nth: int):
+    """Replaces the nth occurrance of a substring within a string.
+
+    >>> replace_nth('this is a test', ' ', '-', 3)
+    'this is a-test'
+
+    """
+    where = [m.start() for m in re.finditer(source, in_str)][nth - 1]
+    before = in_str[:where]
+    after = in_str[where:]
+    after = after.replace(source, target, 1)
+    return before + after
+
+
 if __name__ == '__main__':
     import doctest