19. May 2012
In the context of “where are your customers” one main element is to monitor file changes: everytime your customer-file changes the new customer entry must be mapped to a certain point in your webmap. This would enable us to update our density maps or other analytical overview maps in terms of business reporting.
So how to monitor the state of change of a file using python and build in functionalities? The magic module is of course the
osmodule which you need to call:
Now you just need to specify your file you would like to monitor and open the file:
filename = '/adresses.csv' file = open(filename)
How to get the time of last changes?:
props = os.stat(file) this = last = props.st_mtime
But you need to compare two different states of times so you need to create a classical while-loop that is always executed as long as the program (we will compile the whole thing in the end…) is executed:
def file_monitor(): while 1: if this > last: last = this ##place your function here this = props.st_mtime time.sleep(120) file_monitor()
We will cover the main function in another article next week. Stay tuned.