[root@mysql]# pip3 install Crypto
Collecting Crypto
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f603a582668>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/crypto/
Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f603a58f828>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/crypto/
Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f603a7dc198>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/crypto/
Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f603a7dc320>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/crypto/
Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f603a7dc4a8>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/crypto/
Could not find a version that satisfies the requirement Crypto (from versions: )
No matching distribution found for Crypto
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