-- coding=utf-8 --
文件
test_1 = open(‘alice.txt’, ‘a’)
test_1.write(“hello 123”)
test_1.write("\nword")
test_1.close()
test_1 = open(r’alice.txt’)
test_1.read()
print(test_1.read(3))
yield生成器
def foo(): # 有yield先生成一个生成器g，调用next方法才开始执行foo,不会赋值给res，直接返回4
print(“start”)
while True:
res = yield 4
print(“res:”, res)
g = foo()
print(next(g))
with open(r’alice.txt’) as test_1:
print(test_1.read())
import sys
text = sys.stdin.read()
words = text.split()
wordcount = len(words)
print(wordcount)
with open(r’ss.txt’, ‘a’) as f1:
f1.write(r"\npliase")
f1.close()
使用fileinput实现懒惰行迭代
import fileinput
for line in fileinput.input(‘alice.txt’):
x = line.read()
print(x)
f = open(“some.txt”, ‘w’)
f.write(‘first line\n’)
f.write(‘second line\n’)
f.write(‘third line\n’)
f.close()
lines = list(open(‘some.txt’))
print(lines)
窗口
import wx
def load(event):
file = open(filename.GetValue())
contents.SetValue(file.read())
file.close()
def save(event):
file = open(filename.GetValue(), ‘w’)
file.write(contents.GetValue())
file.close()
app = wx.App()
win = wx.Frame(None, title=“图书管理系统”, size=(410, 355))
bkg = wx.Panel(win)
lowButton = wx.Button(bkg, label=“打开”)
lowButton.Bind(wx.EVT_BUTTON, load)
saveButton = wx.Button(bkg, label=“保存”)
saveButton.Bind(wx.EVT_BUTTON, save)
filename = wx.TextCtrl(bkg)
contents = wx.TextCtrl(bkg, style=wx.TE_MULTILINE | wx.HSCROLL)
hbox = wx.BoxSizer()
hbox.Add(filename, proportion=1, flag=wx.EXPAND)
hbox.Add(lowButton, proportion=0, flag=wx.LEFT, border=5)
hbox.Add(saveButton, proportion=0, flag=wx.LEFT, border=5)
vbox = wx.BoxSizer(wx.VERTICAL)
vbox.Add(hbox, proportion=0, flag=wx.EXPAND | wx.ALL, border=5)
vbox.Add(contents, proportion=1, flag=wx.EXPAND | wx.LEFT | wx.RIGHT, border=5)
bkg.SetSizer(vbox)
win.Show()
app.MainLoop()