base64 encoding takes 8-bit binary byte data and encodes it uses only the characters A-Z, a-z, 0-9, +, /* so it can be transmitted over channels that do not preserve all 8-bits of data, such as email. Hence, it wants a string of 8-bit bytes. You create those in Python 3 with the b” syntax. … Read more
The output file needs to be opened in binary mode: f = open(‘varstor.txt’,’w’) needs to be: f = open(‘varstor.txt’,’wb’)
Here is my workflow after creating a folder and cd‘ing into it: $ virtualenv venv –distribute New python executable in venv/bin/python Installing distribute………done. Installing pip…………….done. $ source venv/bin/activate (venv)$ python
This is because, even though Var1 exists, you’re also using an assignment statement on the name Var1 inside of the function (Var1 -= 1 at the bottom line). Naturally, this creates a variable inside the function’s scope called Var1 (truthfully, a -= or += will only update (reassign) an existing variable, but for reasons unknown … Read more
pip defaults to installing Python packages to a system directory (such as /usr/local/lib/python3.4). This requires root access. –user makes pip install packages in your home directory instead, which doesn’t require any special privileges.
As suggested by Mark Ransom, I found the right encoding for that problem. The encoding was “ISO-8859-1”, so replacing open(“u.item”, encoding=”utf-8″) with open(‘u.item’, encoding = “ISO-8859-1”) will solve the problem.
Your path only lists Visual Studio 11 and 12, it wants 14, which is Visual Studio 2015. If you install that, and remember to tick the box for Languages → C++ then it should work. On my Python 3.5 install, the error message was a little more useful, and included the URL to get it … Read more
I would suggest reading PEP 483 and PEP 484 and watching this presentation by Guido on type hinting. In a nutshell: Type hinting is literally what the words mean. You hint the type of the object(s) you’re using. Due to the dynamic nature of Python, inferring or checking the type of an object being used … Read more
You have to build the regex as a string: TEXTO = sys.argv[1] my_regex = r”\b(?=\w)” + re.escape(TEXTO) + r”\b(?!\w)” if re.search(my_regex, subject, re.IGNORECASE): etc. Note the use of re.escape so that if your text has special characters, they won’t be interpreted as such.
You’re looking for Optional. Since your return type can either be datetime (as returned from datetime.utcnow()) or None you should use Optional[datetime]: from typing import Optional def get_some_date(some_argument: int=None) -> Optional[datetime]: # as defined From the documentation on typing, Optional is shorthand for: Optional[X] is equivalent to Union[X, None]. where Union[X, Y] means a value … Read more