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The Python "TypeError: unsupported operand type(s) for /: 'str' and 'int'" occurs when we try to use the division / operator with a string and a number. To solve the error, convert the string to an int or a float , e.g. int(my_str) / my_num .
The TypeError: unsupported operand type(s) for +: 'int' and 'str' error occurs when an integer value is added with a string that could contain a valid integer value. Python does not support auto casting. You can add an integer number with a different number. You can't add an integer with a string in Python.
The Python "TypeError: unsupported operand type(s) for -: 'str' and 'str'" occurs when we try to use the subtraction - operator with two strings. To solve the error, convert the strings to int or float values, e.g. int(my_str_1) - int(my_str_2) . Here is an example of how the error occurs. main.py.
Ubuntu comes with a version of PIP from precambrian and that's how you have to upgrade it if you do not want to spend hours and hours debugging pip related issues.
apt-get remove python-pip python3-pip
wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py
python3 get-pip.py
As you observed I included information for both Python 2.x and 3.x
If you are behind a proxy, you must do some extra configuration steps before starting the installation. You must set the environment variable http_proxy to the proxy address. Using bash this is accomplished with the command
export http_proxy="http://user:[email protected]:port/"
You can also provide the
--proxy=[user:pass@]url:port
parameter to pip. The [user:pass@] portion is optional.
Updating setuptools has worked out fine for me.
sudo pip install --upgrade setuptools
First of all, this problem exists because of network issues, and uninstalling and re-installing everything won't be of much help. Probably you are behind proxy, and in that case you need to set proxy.
But in my case, I was facing the problem because I wasn't behind proxy. Generally, I work behind proxy, but when working from home, I set the proxy to None in Network settings.
But I was still getting the same errors even after removing the proxy settings.
So, when I did type
env | grep proxy
I found something like this :
http_proxy=http://127.0.0.1:1234/
And this was the reason I was still getting the very same error, even when I thought I had removed the proxy settings.
To unset this proxy, type
unset http_proxy
Follow the same approach for all the other entries, such as https_proxy.
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