marlon questions

• Is python dict very slow for searching key?
• How to check whether a html form has a specific key in Flask?
• Does it make sense that I have to make most of my variables final?
• What' the purpose of @Named annotation
• Why is shape empty?
• Why can't I install cudatookkit=10.1 using pip but can using conda?
• How to combine and negate these two patterns together?
• Table field naming convention and SQL statements
• Why can't I find lsvirtualenv command?
• Why does the lines count differently using two different way. to load text?

marlon answers