Python: python的简单表达式计算器
这是一个简单的表达式计算器, 不太懂用Tkinter写GUI, 参考了别人的代码
from __future__ import division
from Tkinter import Tk, Entry, Button, Label, mainloop
from tkFont import Font
def get_value ():
v = ''
try:
v = eval(text.get()) #use eval to calculate the vlaue of the text
except:
pass
if isinstance(v, (int, float, long)):
pass
else:
v = 'Error...'
label.config(text = v) #use config to change the text
top = Tk()
top.title("calculator")
ft = Font(family = 'Courier New', size = 12)
text = Entry(top, font = ft)
button = Button(top, text = 'Ok', command = get_value)
label = Label(text = '(+ - * / % **)', font = ft)
Enter = lambda x: x.keycode == 13 and get_value()
Key = lambda x: label.config(text = '(+ - * / % **)')
text.bind('<Key>', Enter) #when the key is enter, execute the function Enter
text.focus()
text.bind('<Button-1>', Key) #when click the left-key, execute the function Key
text.pack()
button.pack()
label.pack()
mainloop()
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Script Name: Spider_Create
#Script Label: Create Spider Diagrams
#
#Description: Custom python script developed to create spider diagrams from points contained
#in one or two feature classes. If using two fea ......
#
-*- encoding: gb2312 -*-
import
os, sys, string
import
MySQLdb
#
连接数据库
try
:
conn
=
MySQLdb.connect(host
=
'
localhost
'
,user
=
'
root
'
,passwd
=
'
xxxx
'
,db
=
'
test1
'
)
except
Exception, e:
print
e
sys.exit()
......
闲来无事, 玩玩python...
是采用有道翻译, 然后抓取网页的.
import re, urllib
url="http://dict.youdao.com/search?le=eng&q="
print ("input q to exit")
while 1:
word = raw_input(">>>")
if word=="q":
exit()
else:
word = word.replace(' ', '+')
url += word
u ......
threading — Higher-level threading interface
This module constructs higher-level threading interfaces on top of the lower level _thread module. See also the queue module.
The dummy_threading module is provided for situations where threading cannot be used because _thread is missing.
......
