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# install flask (basic, if path is not set yet)
py -m pip install flask
# or set PATH to use pip:
setx PATH "%PATH%;C:\<path\to\python\directory\>\Scripts"
pip install flask
# if "connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed" [!]:
py -m pip install --trusted-host pypi.python.org pip flask
# if PermissionError: [WinError 5] Access is denied
py -m pip install --user flask
# or via creating a virtual environment venv:
py -m venv c:\path\to\new\environment
# then execute:
c:\path\to\new\environment\Scripts\activate.bat
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//exanple of removing last char from string
var str= "you are gay";
var strWithoutlastchar = str.substring(0, str.length - 1);
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pip install flask
Or If The Problem is "pip" not Found Use :
py -m pip install flask
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from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
return "Hello World!"
if __name__ == "__main__":
app.run()
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python -m pip install flask // run in your virtual environment
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Check for proxy server.
'add the following line to the subl ~/.curlrc file:'
proxy= proxyserver:proxyport
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# Linux
sudo apt-get install python3-venv # If needed
python3 -m venv .venv
source .venv/bin/activate
# macOS
python3 -m venv .venv
source .venv/bin/activate
# Windows
py -3 -m venv .venv
.venv\scripts\activate