Python小例子

之前学习Python的时候自己写的小例子，过段时间看就不记得是什么意思了，先保存下。

例子1-生成图形：

import mathdef fourth(n):    n+=1    cc=math.ceil((n*2-19)/2)    ff=math.floor((n*2-19)/2)    print(cc,ff)    for col in range(n*2-1):        if(col==0 or col==n*2-2):            print('+',end='')        else:            print('-',end='')    print()    for a in reversed(range(n-1)):        print('|',end='')        for b in range(a):            print(' ',end='')        for c in range(n-a-1):            if(c==n-a-2 or a==0):                print('*',end='')            else:                print('-',end='')        for d in range(n-a-2):            if(a==0):                print('*',end='')            else:                print('+',end='')        for e in range(a):            print(' ',end='')        print('|')                        for i in range(n-2):        print('|',end='')        for j in range(i+1):            print(' ',end='')        for k in reversed(range(n-i-2)):            if(k==0):                print('*',end='')            else:                print('+',end='')        for l in reversed(range(n-i-3)):            print('-',end='')        for m in range(i+1):            print(' ',end='')        print('|')    for col in range(n*2-1):        if(col==0 or col==n*2-2):            print('+',end='')        else:            print('-',end='')    print()    print('|',end='')        for i in range(cc):        print(' ',end='')    print("This is a graph.",end='')    for i in range(ff):        print(' ',end='')    print('|')    for col in range(n*2-1):        if(col==0 or col==n*2-2):            print('+',end='')        else:            print('-',end='')        fourth(20)

例子2-去除符号\n\r\t及空格：

#!/usr/bin/python3import pprint, picklefile = open('project.html', 'r')filewrite = open('project-w.html', 'w')nextline = file.readline()findnum = nextline.find(r'\n')while nextline!='':    while (r'\n' in nextline):        findnum = nextline.find(r'\n')        nexttext = nextline[0:findnum]        #print(r'\r' in nexttext)        #print(r'\t' in nexttext)        if (r'\r' in nexttext or r'\t' in nexttext):            nexttext = nexttext.replace(r"\r","")            nexttext = nexttext.replace(r"\t","")                    if(nexttext=="" or nexttext.isspace()):            pass        else:            filewrite.write(nexttext+'\n')        #filewrite.write(nexttext+'\n')        nextline = nextline[findnum+2:]    nextline = file.readline()file.close()filewrite.close()

例子3-selenium-Firefox：

from selenium import webdriver#from selenium.common.exceptions import NoSuchElementException#from selenium.webdriver.common.keys import Keys#from selenium.webdriver.firefox.firefox_binary import FirefoxBinaryimport time#import osbrowser = webdriver.Firefox() # Get local session of firefoxbrowser.get("http://www.baidu.com") # Load page#assert "baidu" in browser.title#elem = browser.find_element_by_name("p") # Find the query box#elem.send_keys("seleniumhq" + Keys.RETURN)time.sleep(5) # Let the page load, will be added to the API#try:#    browser.find_element_by_xpath("//a[contains(@href,'http://seleniumhq.org')]")#except NoSuchElementException:#    assert 0, "can't find seleniumhq"browser.close()#gecko = os.path.normpath(os.path.join(os.path.dirname(__file__), 'geckodriver'))#binary = FirefoxBinary(r'C:\Program Files (x86)\Mozilla Firefox\firefox.exe')#browser = webdriver.Firefox(firefox_binary=binary, executable_path=gecko+'.exe')#browser.get("http://www.baidu.com")#browser.close()

例子4-selenium-chrome：

from selenium import webdriverimport timebrowser = webdriver.Chrome("E:\python\selenium\chromedriver.exe")browser.get("http://www.baidu.com")time.sleep(5)browser.close()