• bennr01

    I think you may be confusing a few different datatypes here, so I'll try to explain some approaches for your problem.

    First of, Python does not really have something like arrays. Usually, when one wants to use something akin to an array in Python, one uses a list instead. The main difference between a list and an array is that usually arrays are fixed size and often fixed type also while Python lists can have any required size and mixed types of elements. However, you wrote "same variables", so lists may not be what you are looking for. Still, heres a short tutorial for lists:

    # create a list
    l = []  # alternatively, use "l = list()"
    # add an element to a list
    # get the size of the list
    # get the first element (index is 0 as indexes start with 0)
    print(l[0])  # prints "1"
    # remove the first element
    del l[0]  # alternatively, use "l.pop(0)", which also returns the element

    Now let's take a look at how lists could be used for your problem:

    # number of players
    num_players = 4
    # number of variables each player has
    num_vars = 10
    # initiate a two-dimensional list with all players or variables
    # a two-dimensional list is a list of lists. In this case, all "variables" will be initialized as None.
    players = [[None] * num_vars] * num_players
    # set 2nd variable for player 3 to 12. Remember that indexes start at 0
    players[2][1] = 12
    # get 2nd variable for player 3
    print(players[2][1])  # prints "12"
    # ============= alternative =============
    # using math, we can do this a bit more efficient using 1-dimensional lists
    # number of players
    num_players = 4
    # number of variables each player has
    num_vars = 10
    # initiate a one-dimensional list with all players or variables
    players = [None] * num_vars * num_players
    # now we can access a variable by using index = (player_index * num_vars + var_index)
    # set 2nd variable for player 3 to 12. Remember that indexes start at 0
    players[2 * num_vars + 1] = 12
    # get 2nd variable for player 3
    print(2 * num_vars + 1)  # prints "12"

    However, as I said before, lists aren't a good solution for this. Let's take a look at another datastructure, the dict. A dict is a mapping of key-value pairs. Think of it like a dictionary, where each word you look up (in this case the key) has some associated words (the value). Here is an example of a dict usage:

    d = {}  # alternatively, use "d = dict()"
    # set a key to a value
    d["name"] = "bennr01"
    # get the number of defined keys in a dict
    print(len(d))  # prints "1"
    # get a value for a key
    print(d["name]")  # prints "bennr01"
    # remove a key-value pair
    del d["name"]

    Using dicts, you can refer to the variables using names. Here's how to use it for your problem:

    players = []
    # create a player here
    player_1 = dict(name="Player 1", score=0)
    # set the score for the first player (again, index 0)
    players[0]["score"] = 100
    # get the score for the first player
    print(players[0]["score"])  # prints "100"
    # ============= alternative ==============
    # instead of using a list for all players, you could also use a dict
    players = {}  # <-- see the difference
    # create a player here
    player_1 = dict(name="Player 1", score=0)
    players[1] = player_1
    # set the score for the first player. As we are using a dict, we do not need to start with 0. We can even use strings
    players["pl_1"]["score"] = 100
    # get the score for the first player
    print(players["pl_1"]["score"])  # prints "100"

    Still, what you should be looking into are classes. Classes can have attributes and methods. As a tutorial would take too long, here is how you would use them:

    class Player(object):
        """This class represents a player"""
        def __init__(self, name):
            self.name = name
            self.score = 0
        def increment_score(self):
            """Increment the score by 1. This is an example for a method."""
            self.score += 1
    players = []
    # create a player
    player = Player("bennr01")
    # get the name
    print(players[0].name)  # prints "bennr01"
    # increase score
    # print score
    print(players[0].score)  # prints "1"

    You can of course combine this with lists and dicts as needed.

    posted in Pythonista read more
  • bennr01

    First of, you can move your *_patient_list into the Patient class to reduce global variables.

    class Patient(object):
        master_patient_list = []  # this should be shared among all Patients
        def __init__(self, ...):

    Second, I think you want something like this for example:

    class Physician(Employee):
        illness2doctor = {}  # shared dict mapping illness -> doctor for illness
        def __init__(self, name):
             # just as example
             self.name = name
        def register_doctor(cls, doctor, illness):
            assert not illness in cls.illness2doctor  # prevent overwrite
            cls.illness2doctor[illness] = doctor
        def get_doctor_for(cls, patient):
            illness = patient.illness
            if illness not in cls.illness2doctor:
                raise KeyError("No doctor for illness")
            return cls.illness2doctor[illness]
    # --- usage ---
    # create a new physician
    alice = Physician(name="Alice")
    # alice can treat "Broken Leg"
    Physician.register_doctor(alice, "Broken Leg")
    # now we can get the doctor for patient1
    # -> should print "Alice"

    posted in Pythonista read more
  • bennr01

    [s[i:i+2] for s in a for i in range(0, len(s), 2)]

    Replace 2 with chunk length.

    posted in Pythonista read more
  • bennr01


    You can also use six by running pip -6 install…, but I’ve found modules installed into Python 3 that way from Python 2 StaSh to be unreliable. You can import them, but sometimes they don’t work, and pip list doesn’t show them in either StaSh 2 or 3. So I just wouldn’t do it.

    -6 does not use six, it just tells pip to use the shared site-packages directory so that you can install a package for both interpreters. Some packages may distribute different files depending on the installing python version which may cause the problems. Also, since pip stores information about the installed packages within site-packages, you must specify -6 for pip show too (pip -6 show).

    posted in Pythonista read more
  • bennr01

    StaSh runs on both py2 and py3, though not all commands support py3. pip uses the python interpreter StaSh was launched with and installs the package into the version specific site-packages directory. You can use the -6 option to tell pio that it should install a package into the shared site-packages directory.

    You can force StaSh to use a specific python version by long-pressing the Run-Button and choosing the "run with python X" option.

    posted in Pythonista read more
  • bennr01

    @JonB said:


    Shouldn't it be f.read()?

    I have to find all the numerical values in that text file and compute their sum. How can I do this in Pythonista?

    Assuming each line has exactly one numerical value:

    def read_ints_from_file(filepath):
        Read integers from file path filepath.
        values = []
        # open file read-only
        with open(filepath, "r") as fin:
            # read file line by line
            for line in fin:
                # remove any leading/trailing whitespace characters and convert to integer
                v = int(line.strip())
        return values
    # example usage. sum() calculates the sum of the argument(s)

    If the file contains text other than the numbers, you should look into regular expressions (using re) to find the values.

    posted in Pythonista read more
  • bennr01


    Did you install this package using the -6 parameter or did you use an outdated StaSh version for this installation? Normally, packages should now be installed only in site-package-3 or site-packages-2 depending on the python version, but it seems like xmlrpc is installed in site-packages...

    @JonB said:

    @bennr01 -- probably need to add xmlrpc to the blacklist...

    It seems like in this case xmlrpc is provided by the future package.

    posted in Pythonista read more
  • bennr01

    @mikael said:

    @bennr01, a big thank you! for all you do to keep us stashed & pipped.

    It's always a pleasure. Though in this case, the fix was made by yjqiang.

    posted in Pythonista read more
  • bennr01

    After looking into this issue for a bit, it seems like the same bug as in Issue #364. This should have been fixed 12 months ago, just a month after the latest version bump for master. So it is possible that you have a version installed before that version bump.

    So, since it seems like the master branch became a bit outdated,I just merged 152 commits from dev into master. This should include the fix as well as a version bump, so could you please try another selfupdate?

    posted in Pythonista read more
  • bennr01

    would appreciate any hints on how to debug this?

    In general, stashconf py_traceback 1, stashconf py_pdb 1 and pip --verbose install pythonista-gestures.

    I just tried and could not replicate the error (it installs successfully).

    Error matches a stash issue.

    I think that one is a different issue. StaSh pip has two installers: one for source install (via setup.py) and one for wheels (.whl). The linked issue was regarding the source install, while this issue is with wheel installations. Also, I think we already fixed the linked issue, but I am not sure...

    posted in Pythonista read more

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