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  • whats the best way to parse and replace the string with its values ?

    - by shahjapan
    I may have string like, """Hello, %(name)s, how are you today, here is amount needed: %(partner_id.account_id.debit_amount)d """ what would be the best solution for such template may i need to combine regular expression and eval, input string may differ like $partner_id.account_id.debit_amount$ - for the moment I've kept as python string format - just for testing.

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  • Generate table schema inspecting Excel(CSV) and import data

    - by Frank Malina
    How would I go around creating a MYSQL table schema inspecting an Excel(or CSV) file. Are there any ready Python libraries for the task? Column headers would be sanitized to column names. Datatype would be estimated based on the contents of the spreadsheet column. When done, data would be loaded to the table. I have an Excel file of ~200 columns that I want to start normalizing.

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  • Assigning IDs to instances of a class (Pythonic)

    - by mellort
    I want to have each instance of some class have a unique integer identifier based on the order that I create them, starting with (say) 0. In Java, I could do this with a static class variable. I know I can emulate the same sort of behavior with Python, but what would be the most 'Pythonic' way to do this? Thanks

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  • Wxpython cut copy paste and openfiledialog...

    - by Marius
    i have a web browser made in python with menu. in one menu i have cut copy paste but no functionality and i need to make them work. i need an example of class oncopy.(event menu) Open file i manage to work like this .takes file and print on screen the link to that file but how can make open dialog to open a file at least one type of file?

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  • How do I rename a process on Linux?

    - by jemfinch
    I'm using Python, for what it's worth, but will accept answers in any applicable language. I've tried writing to /proc/$pid/cmdline, but that's a readonly file. I've tried assigning a new string to sys.argv[0], but that has no perceptible impact. Are there any other possibilities? My program is executing processes via os.system (equivalent to system(3)) so a general, *NIX-based solution using an additional spawning process would be fine.

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  • 64-bit integers in Cython

    - by Homayoon
    I'm trying to interface a C++ library (pHash) with Python using Cython, but I have trouble with some of the types. The library functions use "unsigned long long" and I can't find a way to declare variables and parameters with this type. I searched for a list of the types that I can use with cdef but I found nothing. Can anyone point me to such a list (if it exists) or otherwise suggest a way to use 64 bit types in Cython? Thanks.

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  • datetime.datetime.strptime problem

    - by Rahul99
    My input string is '16-MAR-2010 03:37:04' and i want to store it as datetime. I am trying to use: db_inst.HB_Create_Ship_Date = datetime.strptime(fields[7]," %d-%b-%Y %H:%M:%S ") fields[7] = '16-MAR-2010 03:37:04' I am getting an error: ::ValueError: time data '16-MAR-2010 03:37:04' does not match format ' %d-%b-%Y %H:%M:%S ' I am running Python version --EDIT-ME-- on the --EDIT-ME-- operating system. My locale is --EDIT-ME--. Which format do I have to use?

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  • Getting started with C++ ( the paradigm shift from Python )

    - by orokusaki
    I want to learn C++ so that i can develop C++ Python modules for server-related stuff. I'm a purely dynamic languages developer (Python, PHP, Ruby, etc). I want to learn a fast language, and if I'm going to do this, I'd rather learn a really fast language like C++. Before I even get started though, I understand that suddenly working with static types, a different syntax, and compiling code will be quite the paradigm shift. Is there any advice that a C++ dev who also has dynamic languages experience can give me to me to help me make that shift faster?

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  • tk: how to invoke it just to display something, and return to the main program?

    - by max
    Sorry for the noob question but I really don't understand this. I'm using python / tkinter and I want to display something (say, a canvas with a few shapes on it), and keep it displayed until the program quits. I understand that no widgets would be displayed until I call tkinter.tk.mainloop(). However, if I call tkinter.tk.mainloop(), I won't be able to do anything else until the user closes the main window. I don't need to monitor any user input events, just display some stuff. What's a good way to do this without giving up control to mainloop? EDIT: Is this sample code reasonable: class App(tk.Tk): def __init__(self, sim): self.sim = sim # link to the simulation instance self.loop() def loop(): self.redraw() # update all the GUI to reflect new simulation state sim.next_step() # advance simulation another step self.after(0, self.loop) def redraw(): # get whatever we need from self.sim, and put it on the screen EDIT2 (added after_idle): class App(tk.Tk): def __init__(self, sim): self.sim = sim # link to the simulation instance self.after_idle(self.preloop) def preloop(): self.after(0, self.loop) def loop(): self.redraw() # update all the GUI to reflect new simulation state sim.next_step() # advance simulation another step self.after_idle(self.preloop) def redraw(): # get whatever we need from self.sim, and put it on the screen

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  • How do "and" and "or" work when combined in one statement?

    - by orokusaki
    For some reason this function confused me: def protocol(port): return port == "443" and "https://" or "http://" Can somebody explain the order of what's happening behind the scenes to make this work the way it does. I understood it as this until I tried it: Either A) def protocol(port): if port == "443": if bool("https://"): return True elif bool("http://"): return True return False Or B) def protocol(port): if port == "443": return True + "https://" else: return True + "http://" Is this some sort of special case in Python, or am I completely misunderstanding how statements work?

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  • How do I unit test the methods in a method object?

    - by Sancho
    I've performed the "Replace Method with Method Object" refactoring described by Beck. Now, I have a class with a "run()" method and a bunch of member functions that decompose the computation into smaller units. How do I test those member functions? My first idea is that my unit tests be basically copies of the "run()" method (with different initializations), but with assertions between each call to the member functions to check the state of the computation. (I'm using Python and the unittest module.)

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  • How to use urllib2 when users only have a API token?

    - by jorrebor
    how would i tranfoms this curl command: curl -v -u 82xxxxxxxxxxxx63e6:api_token -X GET https://www.toggl.com/api/v6/time_entries.json into urlib2? I found this tutorial: http://www.voidspace.org.uk/python/articles/authentication.shtml but they use a password and username. I can only use an API token. Thank you. see also this question: Urllib2 raises 403 error while the same request in curl works fine

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  • Get the common prefix substring through Regex

    - by Dreampuf
    like this text = " \t hello there\n \t how are you?\n \t HHHH" hello there how are you? HHHH Could I get the common prefix substring through regex? I try to In [36]: re.findall(r"(?m)(?:(^[ \t]+).+[\n\r]+\1)", " \t hello there\n \t how are you?\n \t HHHH") Out[36]: [' \t '] But apparently that common prefix substring is ' \t ' I want use for dedent function like python textwrap module.

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  • How to print all possibilities of a number that occur interchanging the digits in a number?

    - by RADHA KRISHNA LOLLA
    I want to print that the all possibilities of a number that occurs interchanging the digits in a number? I want to print that the all possibilities of a number that occurs interchanging the digits in a number? Suppose a number 1234 it have 24 possibilities 4!=24 123 have 6 possibilities 3!=6 123 132 213 231 312 321 i want these numbers as output please tell me the structure of this program in the python

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