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Edit File : redemo.py \| Size : 5.66 KB
#! /usr/bin/python2.7 """Basic regular expression demonstration facility (Perl style syntax).""" from Tkinter import * import re class ReDemo: def __init__(self, master): self.master = master self.promptdisplay = Label(self.master, anchor=W, text="Enter a Perl-style regular expression:") self.promptdisplay.pack(side=TOP, fill=X) self.regexdisplay = Entry(self.master) self.regexdisplay.pack(fill=X) self.regexdisplay.focus_set() self.addoptions() self.statusdisplay = Label(self.master, text="", anchor=W) self.statusdisplay.pack(side=TOP, fill=X) self.labeldisplay = Label(self.master, anchor=W, text="Enter a string to search:") self.labeldisplay.pack(fill=X) self.labeldisplay.pack(fill=X) self.showframe = Frame(master) self.showframe.pack(fill=X, anchor=W) self.showvar = StringVar(master) self.showvar.set("first") self.showfirstradio = Radiobutton(self.showframe, text="Highlight first match", variable=self.showvar, value="first", command=self.recompile) self.showfirstradio.pack(side=LEFT) self.showallradio = Radiobutton(self.showframe, text="Highlight all matches", variable=self.showvar, value="all", command=self.recompile) self.showallradio.pack(side=LEFT) self.stringdisplay = Text(self.master, width=60, height=4) self.stringdisplay.pack(fill=BOTH, expand=1) self.stringdisplay.tag_configure("hit", background="yellow") self.grouplabel = Label(self.master, text="Groups:", anchor=W) self.grouplabel.pack(fill=X) self.grouplist = Listbox(self.master) self.grouplist.pack(expand=1, fill=BOTH) self.regexdisplay.bind('<Key>', self.recompile) self.stringdisplay.bind('<Key>', self.reevaluate) self.compiled = None self.recompile() btags = self.regexdisplay.bindtags() self.regexdisplay.bindtags(btags[1:] + btags[:1]) btags = self.stringdisplay.bindtags() self.stringdisplay.bindtags(btags[1:] + btags[:1]) def addoptions(self): self.frames = [] self.boxes = [] self.vars = [] for name in ('IGNORECASE', 'LOCALE', 'MULTILINE', 'DOTALL', 'VERBOSE'): if len(self.boxes) % 3 == 0: frame = Frame(self.master) frame.pack(fill=X) self.frames.append(frame) val = getattr(re, name) var = IntVar() box = Checkbutton(frame, variable=var, text=name, offvalue=0, onvalue=val, command=self.recompile) box.pack(side=LEFT) self.boxes.append(box) self.vars.append(var) def getflags(self): flags = 0 for var in self.vars: flags = flags \| var.get() flags = flags return flags def recompile(self, event=None): try: self.compiled = re.compile(self.regexdisplay.get(), self.getflags()) bg = self.promptdisplay['background'] self.statusdisplay.config(text="", background=bg) except re.error, msg: self.compiled = None self.statusdisplay.config( text="re.error: %s" % str(msg), background="red") self.reevaluate() def reevaluate(self, event=None): try: self.stringdisplay.tag_remove("hit", "1.0", END) except TclError: pass try: self.stringdisplay.tag_remove("hit0", "1.0", END) except TclError: pass self.grouplist.delete(0, END) if not self.compiled: return self.stringdisplay.tag_configure("hit", background="yellow") self.stringdisplay.tag_configure("hit0", background="orange") text = self.stringdisplay.get("1.0", END) last = 0 nmatches = 0 while last <= len(text): m = self.compiled.search(text, last) if m is None: break first, last = m.span() if last == first: last = first+1 tag = "hit0" else: tag = "hit" pfirst = "1.0 + %d chars" % first plast = "1.0 + %d chars" % last self.stringdisplay.tag_add(tag, pfirst, plast) if nmatches == 0: self.stringdisplay.yview_pickplace(pfirst) groups = list(m.groups()) groups.insert(0, m.group()) for i in range(len(groups)): g = "%2d: %r" % (i, groups[i]) self.grouplist.insert(END, g) nmatches = nmatches + 1 if self.showvar.get() == "first": break if nmatches == 0: self.statusdisplay.config(text="(no match)", background="yellow") else: self.statusdisplay.config(text="") # Main function, run when invoked as a stand-alone Python program. def main(): root = Tk() demo = ReDemo(root) root.protocol('WM_DELETE_WINDOW', root.quit) root.mainloop() if __name__ == '__main__': main() Back

Edit File : redemo.py | Size : 5.66 KB

#! /usr/bin/python2.7
"""Basic regular expression demonstration facility (Perl style syntax)."""

from Tkinter import *
import re

class ReDemo:

def __init__(self, master):
        self.master = master

self.promptdisplay = Label(self.master, anchor=W,
                text="Enter a Perl-style regular expression:")
        self.promptdisplay.pack(side=TOP, fill=X)

self.regexdisplay = Entry(self.master)
        self.regexdisplay.pack(fill=X)
        self.regexdisplay.focus_set()

self.addoptions()

self.statusdisplay = Label(self.master, text="", anchor=W)
        self.statusdisplay.pack(side=TOP, fill=X)

self.labeldisplay = Label(self.master, anchor=W,
                text="Enter a string to search:")
        self.labeldisplay.pack(fill=X)
        self.labeldisplay.pack(fill=X)

self.showframe = Frame(master)
        self.showframe.pack(fill=X, anchor=W)

self.showvar = StringVar(master)
        self.showvar.set("first")

self.showfirstradio = Radiobutton(self.showframe,
                                         text="Highlight first match",
                                          variable=self.showvar,
                                          value="first",
                                          command=self.recompile)
        self.showfirstradio.pack(side=LEFT)

self.showallradio = Radiobutton(self.showframe,
                                        text="Highlight all matches",
                                        variable=self.showvar,
                                        value="all",
                                        command=self.recompile)
        self.showallradio.pack(side=LEFT)

self.stringdisplay = Text(self.master, width=60, height=4)
        self.stringdisplay.pack(fill=BOTH, expand=1)
        self.stringdisplay.tag_configure("hit", background="yellow")

self.grouplabel = Label(self.master, text="Groups:", anchor=W)
        self.grouplabel.pack(fill=X)

self.grouplist = Listbox(self.master)
        self.grouplist.pack(expand=1, fill=BOTH)

self.regexdisplay.bind('<Key>', self.recompile)
        self.stringdisplay.bind('<Key>', self.reevaluate)

self.compiled = None
        self.recompile()

btags = self.regexdisplay.bindtags()
        self.regexdisplay.bindtags(btags[1:] + btags[:1])

btags = self.stringdisplay.bindtags()
        self.stringdisplay.bindtags(btags[1:] + btags[:1])

def addoptions(self):
        self.frames = []
        self.boxes = []
        self.vars = []
        for name in ('IGNORECASE',
                     'LOCALE',
                     'MULTILINE',
                     'DOTALL',
                     'VERBOSE'):
            if len(self.boxes) % 3 == 0:
                frame = Frame(self.master)
                frame.pack(fill=X)
                self.frames.append(frame)
            val = getattr(re, name)
            var = IntVar()
            box = Checkbutton(frame,
                    variable=var, text=name,
                    offvalue=0, onvalue=val,
                    command=self.recompile)
            box.pack(side=LEFT)
            self.boxes.append(box)
            self.vars.append(var)

def getflags(self):
        flags = 0
        for var in self.vars:
            flags = flags | var.get()
        flags = flags
        return flags

def recompile(self, event=None):
        try:
            self.compiled = re.compile(self.regexdisplay.get(),
                                       self.getflags())
            bg = self.promptdisplay['background']
            self.statusdisplay.config(text="", background=bg)
        except re.error, msg:
            self.compiled = None
            self.statusdisplay.config(
                    text="re.error: %s" % str(msg),
                    background="red")
        self.reevaluate()

def reevaluate(self, event=None):
        try:
            self.stringdisplay.tag_remove("hit", "1.0", END)
        except TclError:
            pass
        try:
            self.stringdisplay.tag_remove("hit0", "1.0", END)
        except TclError:
            pass
        self.grouplist.delete(0, END)
        if not self.compiled:
            return
        self.stringdisplay.tag_configure("hit", background="yellow")
        self.stringdisplay.tag_configure("hit0", background="orange")
        text = self.stringdisplay.get("1.0", END)
        last = 0
        nmatches = 0
        while last <= len(text):
            m = self.compiled.search(text, last)
            if m is None:
                break
            first, last = m.span()
            if last == first:
                last = first+1
                tag = "hit0"
            else:
                tag = "hit"
            pfirst = "1.0 + %d chars" % first
            plast = "1.0 + %d chars" % last
            self.stringdisplay.tag_add(tag, pfirst, plast)
            if nmatches == 0:
                self.stringdisplay.yview_pickplace(pfirst)
                groups = list(m.groups())
                groups.insert(0, m.group())
                for i in range(len(groups)):
                    g = "%2d: %r" % (i, groups[i])
                    self.grouplist.insert(END, g)
            nmatches = nmatches + 1
            if self.showvar.get() == "first":
                break

if nmatches == 0:
            self.statusdisplay.config(text="(no match)",
                                      background="yellow")
        else:
            self.statusdisplay.config(text="")

# Main function, run when invoked as a stand-alone Python program.

def main():
    root = Tk()
    demo = ReDemo(root)
    root.protocol('WM_DELETE_WINDOW', root.quit)
    root.mainloop()

if __name__ == '__main__':
    main()

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