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mirror of https://github.com/eternnoir/pyTelegramBotAPI.git synced 2023-08-10 21:12:57 +03:00
pyTelegramBotAPI/telebot/service_utils.py
2023-01-08 10:49:27 +04:00

85 lines
1.9 KiB
Python

import random
import string
from io import BytesIO
try:
# noinspection PyPackageRequirements
from PIL import Image
pil_imported = True
except ImportError:
pil_imported = False
def is_string(var) -> bool:
"""
Returns True if the given object is a string.
"""
return isinstance(var, str)
def is_dict(var) -> bool:
"""
Returns True if the given object is a dictionary.
:param var: object to be checked
:type var: :obj:`object`
:return: True if the given object is a dictionary.
:rtype: :obj:`bool`
"""
return isinstance(var, dict)
def is_bytes(var) -> bool:
"""
Returns True if the given object is a bytes object.
:param var: object to be checked
:type var: :obj:`object`
:return: True if the given object is a bytes object.
:rtype: :obj:`bool`
"""
return isinstance(var, bytes)
def is_pil_image(var) -> bool:
"""
Returns True if the given object is a PIL.Image.Image object.
:param var: object to be checked
:type var: :obj:`object`
:return: True if the given object is a PIL.Image.Image object.
:rtype: :obj:`bool`
"""
return pil_imported and isinstance(var, Image.Image)
def pil_image_to_file(image, extension='JPEG', quality='web_low'):
if pil_imported:
photoBuffer = BytesIO()
image.convert('RGB').save(photoBuffer, extension, quality=quality)
photoBuffer.seek(0)
return photoBuffer
else:
raise RuntimeError('PIL module is not imported')
def chunks(lst, n):
"""Yield successive n-sized chunks from lst."""
# https://stackoverflow.com/a/312464/9935473
for i in range(0, len(lst), n):
yield lst[i:i + n]
def generate_random_token() -> str:
"""
Generates a random token consisting of letters and digits, 16 characters long.
:return: a random token
:rtype: :obj:`str`
"""
return ''.join(random.sample(string.ascii_letters, 16))