Understanding timedelta

Question

Given the python code below  please help me understand what is happening there   start time   time time   time sleep 42  end time   time time    uptime   end time - start time  human uptime   str datetime timedelta seconds int uptime      So I get the difference between start time and end time  on line 5 I round up the duration by casting and what now  what s the further explanation   I know what delta means average or difference   but why do I have to pass seconds   uptime to timedelta and why does the string casting works so nicely that I get HH MM SS

User · Answer

why do I have to pass seconds   uptime to timedelta   Because timedelta objects can be passed seconds  milliseconds  days  etc    so you need to specify what are you passing in  this is why you use the explicit key   Typecasting to int is superfluous as they could also accept floats      and why does the string casting works so nicely that I get HH MM SS     It s not the typecasting that formats  is the internal   str   method of the object  In fact you will achieve the same result if you write   print datetime timedelta seconds int uptime

User · Answer

Because timedelta is defined like   class datetime timedelta  days    seconds    microseconds    milliseconds    minutes    hours    weeks     All arguments are optional and default to 0   You can easily say  Three days and four milliseconds  with optional arguments that way    gt  gt  gt  datetime timedelta days 3  milliseconds 4  datetime timedelta 3  0  4000   gt  gt  gt  datetime timedelta 3  0  0  4   no need for that  datetime timedelta 3  0  4000    And for str casting  it returns a nice formatted value instead of   repr   to improve readability  From docs      str t     Returns a string in the form  D day s     H H MM SS  UUUUUU     where D is negative for negative t   5     gt  gt  gt  datetime timedelta seconds   42    repr      datetime timedelta 0  42    gt  gt  gt  datetime timedelta seconds   42    str      0 00 42    Checkout documentation   http   docs python org library datetime html timedelta-objects

[python] Understanding timedelta

Examples related to python

Examples related to timedelta