(yolov5) PS F:\study_code\study_python\yolo\yolov5-master> pip install -r requirements.txt
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1108: The handshake operation timed out'))': /simple/matplotlib/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1108: The handshake operation timed out'))': /simple/matplotlib/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1108: The handshake operation timed out'))': /simple/matplotlib/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1108: The handshake operation timed out'))': /simple/matplotlib/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1108: The handshake operation timed out'))': /simple/matplotlib/
ERROR: Could not find a version that satisfies the requirement matplotlib>=3.2.2
ERROR: No matching distribution found for matplotlib>=3.2.2

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Step 1:
Press Win+R to open Run, type in “regedit” and click OK.
Step 2:
Move to HKEY_CURRENT_USER/Software/Microsoft/Windows/Current Version/Internet Settings.
Step 3:
Find a file with the name 'ProxyServer' and delete it.
Step 4:
Open cmd
Step 5:
Fire a command 'pip install flask-bcrypt'