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from typing import Any, Optional, Tuple
from urllib.parse import urljoin, urlparse
def is_url(string: str) -> bool:
try:
tmp = urlparse(string)
return all([tmp.scheme, tmp.netloc])
except ValueError:
return False
def coerce_to_int(string: str) -> Optional[int]:
try:
return int(string)
except ValueError:
return None
def truncate(teks: str, subtitution_text: str, maxlen: int, startsub: int = 0) -> str:
"""
Truncate text
eg.
:param teks: 'This is long silly dummy text'
:param subtitution_text: '...'
:param maxlen: 12
:param startsub: 3
:return: 'This...ly dummy text'
"""
if startsub > maxlen:
raise ValueError("Var startsub cannot be bigger than maxlen.")
elif len(teks) <= maxlen:
return teks
else:
lensu = len(subtitution_text)
beg = teks[:startsub]
mid = (
subtitution_text
if lensu <= maxlen - startsub
else subtitution_text[: maxlen - startsub]
)
end = teks[startsub + lensu - maxlen :] if lensu < maxlen - startsub else ""
return beg + mid + end
def tuple_subtract(tuple_one: Tuple[Any, ...], tuple_two: Tuple[Any, ...]) -> Tuple[Any, ...]:
"""
Returns tuple with members in tuple_one
but not in tuple_two
"""
return tuple(i for i in tuple_one if i not in tuple_two)
def resolve_path(current_dir: str, relative_path: str) -> str:
"""
Resolve path containing dots
eg. '/foo/bar/book.html' + '../img.png' = '/foo/img.png'
NOTE: '/' suffix is important to tell that current dir in 'bar'
"""
# can also using os.path.normpath()
# but if the image in zipfile then posix path is mandatory
return urljoin(current_dir, relative_path)
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