A Timestamp is a sequence of characters, that signify the occurrence of an event. Timestamps are required extensively in computer science. This exists of varying precision and accuracy i.e. some timestamps have the precision up to milliseconds for the occurrence of the even, others do not. This allows Timestamps of different forms (and standards) to exist. In this article, we will take a look at methods for finding creation and modification timestamps of a file. We will be using the file with the following properties for the demonstration.
We will use getctime() and getmtime() function found inside path module in the os library, for getting the creation and modification times of the file. Both the above function return time in seconds since EPOCH (00:00:00 UTC on 1 January 1970) (time is of float datatype). Since that number doesn’t resemble an understandable timestamp, we would have to convert that time i.e. it becomes recognizable. For that purpose, we would be using ctime() function found inside the time library.
Convert a time in seconds since the Epoch to a string in local time.
This is equivalent to asctime(localtime(seconds)). When the time tuple is
not present, current time as returned by localtime() is used.
seconds = A integer/float value
A string denoting a timestamp
Below is the implementation:
The file located at the path C:\Program Files (x86)\Google\pivpT.png was created at Wed Dec 23 15:05:48 2020
and was last modified at Mon Dec 14 14:59:20 2020
The timestamp of the above code has the following format qualifiers –
[Day](3) [Month](3) [day](2) [Hours:Minutes:Seconds](8) [Year](4)
Where the word inside the bracket is the cue for what is being displayed, and the number following it within the parenthesis displays the length it will occupy.
Note: It is possible to alter the format of the timestamp used in the above code. By default, the ctime() function would return a timestamp of the aforementioned syntax. In order to change it, we would have to pass it to strptime() function (also found inside time library) to create a time structure (object) out of it. Then we can pass format specifiers to strftime(), to create a custom timestamp out of the time structure. In the following code, we will be getting the modification time of the same file in ISO 8601 timestamp format.
The file located at the path C:\Program Files (x86)\Google\pivpT.png was last modified at 2020-12-14 14:59:20
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