Das deutsche Python-Forum

Code: Alles auswählen

# beispiel 1 
def f1(x):
    return x+1
def f2(x):
    return f1(x)+1
print f2(1)

# beispiel 2
f1 = lambda x: x+1
def f2(x):
    return f1(x)+1
print f2(1)

# beispiel 3
def f1(x):
    return x+1
f2= lambda x: f1(x)+1
print f2(1)

# beispiel 4
f1 = lambda x: x+1
f2 = lambda x: f1(x)+1
print f2(1)

Code: Alles auswählen

l = [("hello", 0), ("World", 1), ("world", 2), ("HELLo", -10)]
l.sort(key=lambda x: x[0].lower())

Code: Alles auswählen

l = [("hello", 0), ("World", 1), ("world", 2), ("HELLo", -10)]
def keyfunc(x):
    return x[0].lower()
l.sort(key=keyfunc)

Code: Alles auswählen

class ClassTKWINDOW:
    def __init__(self,master):
        self.but = Button(master, text="test", command=lambda: textmalen('hallo welt'))
        self.but.pack() 

Code: Alles auswählen

class ClassTKWINDOW:
    def __init__(self,master):
        def callback():
            textmalen('hallo welt')
        self.but = Button(master, text="test", command=callback)
        self.but.pack() 

Code: Alles auswählen

    def label_button_row(self, parent_widget=None,
                            btnlst=None, start_count=0):
        """Build a 2 column table with a label beside each button in a row.
        Bind a keyboard sequence to the button command.
        Display this keyboard sequence on the label.

        todo:
            - think about a parameter for the widget to bind the Hotkeys
            - rename to: labled_button_row, draw_labled_button_row

        Parameter:
        --> parent_widget:
                Parent widget to place the table

        --> btnlst:
                Type: List of dicts representing a button
                Example:
                    {'text':'**bold**',     # displayed on the Button (string)
                    'cmd':self.on_tag_insert,   # command
                    'open_tag':'**',        # chars representing the beginning
                                            # of a tag for inserting (string)
                    'close_tag':'**',       # chars representing the end
                                            # of a tag for inserting (string)
                    'keytxt':'CTRL+b',      # displayed on the Label (string)
                    'hotkey':'<Control-b>'} # keyboard sequence (string)
                Note:
                    The existence of 'open_tag' and 'close_tag' in btnlst
                    decides which command is bound to the Button.
                    If they aren't there 'cmd' must be a function without
                    parameters!!!
                    otherwise 'cmd' needs following parameters:
                        otag = btn['open_tag']
                        ctag = btn['close_tag']
                        event = None  # Placeholder for a keysequence

        --> start_count:
                Type: int

                Description:
                    The table is relized with tkinter grid layout manager.
                    start_count is used if there is already a grid
                    (with a Label beside a button).
                    start_count can add the automatic genrated
                    buttons under the existing.
                    In Wombat_Editor it is used to put a label_button_row
                    under a Tkinter menubutton(file choose, headlines).
        """
        i = start_count
        for btn in btnlst:
            try:
                otag = btn['open_tag']
                ctag = btn['close_tag']
                event = None
                doit = lambda e=event, o=otag, c=ctag:self.on_tag_insert(e,o,c)
                tk.Button(parent_widget, text=btn['text'], command=doit,
                        relief=tk.RIDGE
                        ).grid(column=0, row=i, sticky=tk.W+tk.E)
                self.text.bind(btn['hotkey'],doit)
            except KeyError:
                # generate buttons with an unique command  for every button 
                tk.Button(parent_widget, text=btn['text'], command=btn['cmd'],
                        relief=tk.RIDGE
                        ).grid(column=0, row=i, sticky=tk.W+tk.E)
            tk.Label(parent_widget, text=btn['keytxt'], relief=tk.FLAT
                ).grid(column=1, row=i, sticky=tk.W)
            i +=1