![]() In the example code above it shows conversion of string without timezone to datetime as variable named str_to_dt. ![]() tzname()) # None 12 13 # calculating with naive object, returns wrong time 14 utc = timezone( 'UTC')ġ7 print(utc_dt) # 11:10:56+00:00 18 print(utc_dt. The response of code will be changed depending on runtime environment.Ĥ 5 date_str = ' 20:10:56' 6 # str_to_dt is `naive` 7 str_to_dt = datetime. If executing the timezone conversion code without paying attention to aware and naive, Pay attention to processing with timezone on application execution environment Or d.tzinfo is not None and d.tzinfo.utcoffset(d) returns None T.tzinfo of object t is not None, and t.tzinfo.utcoffset(t) returns not Noneĭ.tzinfo is None. T.tzinfo of object t is not None, and t.tzinfo.utcoffset(None) returns not None Whether the time and datetime types are aware or naive can be checked below. Objects created from types are not unique. However, relationship between types and aware/ naive objects is complicated because In short, the aware object should be used in dealing with time data with timezone. Naive objects are easy to understand and to work with, at the cost of ignoring some aspects of reality. Whether a naive object represents Coordinated Universal Time (UTC), local time, or time in some other timezone is purely up to the program, just like it is up to the program whether a particular number represents metres, miles, or mass. An aware object is used to represent a specific moment in time that is not open to interpretationĪ naive object does not contain enough information to unambiguously locate itself relative to other date/time objects. The official Python document says as below,Īn aware object has sufficient knowledge of applicable algorithmic and political time adjustments, such as time zone and daylight saving time information, to locate itself relative to other aware objects. In dealing with date and time in Python, keep in mind two kind of data naive and aware. Sample code with fromtimestamp function is as bellow.Ĥ 5 tzinfos = Ħ date_str = ' 20:10:56' 7 str_to_dt = parse(date_str + ' JST', tzinfos =tzinfos)Ĩ print(str_to_dt) Points to keep in mind when dealing with date and time naive and aware Using the fromtimestamp function in datetime module makes the code simpler as well. It is often the case that I judge it by digits or actual calculation by fuction. Just one thing to be careful of this conversion is to check whether the numeric types of epoch time is in second or millisecond. Therefore, the unix time is merely the number of seconds between a particular date and the Unix Epoch. The epoch time is also called as Unix time and this counts starts at the Unix Epoch on January 1st, 1970 at UTC. Now convert numeric data types of eopch time to datetime. There are three types to process date and time in Python. Because I always google the way to convert a string representing the date to datetime and change timezone on the Internet, this is note to self article.
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