Python语言快速上手学习方法

最近在学习Python，后面搞机器人项目需要用到，所以要快速上手，我使用的是PyCharm这个IDE，看起来就舒服，学习起来就有劲啦，作为一名有工作经验的老司机，我学习编程语言的方法不会像大学生那样从头到尾学一遍，我会选择，够用，能用，实用即可，拒绝晦涩的语法，在不影响效率的情况下，我会采取容易看懂，后期项目可维护性等的方式来学习和编程，至于如何灵活运用Python语言，我认为是需要在项目中，才能不断精进的，毕竟，作为一门编程语言，它仅仅只是工具而已。

如果要在python中写中文，则要在xx.py的最前面声明

#coding:utf-8

一、基础语法：变量，字符串，函数，逻辑判断，循环

varline = 2 ;print(varline);#打印字符串print("hello Python");print("你好，Python");#整型和字符串的转化num1 = 100 ;num2 = "100";num3 = num1 + int(num2);print(num3);#字符串操作str1 = "hello world" ;str2 = str1 * 3 ;string_count = len(str1);print(string_count);print(str2);#字符串索引等价print(str1[0]); print(str1[-11])  #===>hprint(str1[1]); print(str1[-10])  #===>eprint(str1[2]); print(str1[-9])   #===>l#可以将字符串进行分割print(str1[0:5]);print(str1[6:11]); #===> hello   worldprint(str1[-4:]);#函数的定义和使用def Print():  print("hello world");  return "sss" ;sss = Print();print(sss);def add(arg1 , arg2):  return arg1 + arg2 ;print(add(1,2));def getTempatuare(temp):  return temp *9/5 + 32 ;print(str(getTempatuare(35)) + "'F");#克转千克算法def print_kg(g):  return float(g / 1000) ;print(str(print_kg(1)) + "kg");#求直角三角形斜边的长度def Line_print(arg1,arg2):  return ((arg1*arg1 + arg2 * arg2))**0.5print("The right triangle third side's length is " + str(Line_print(3,4)));#str_rp = str1.replace(str1[:3],'*'*9);#print(str_rp)str11 = "{} a word she can get what she {} for."str12 = "{preposition} a word she can get what she {verb} for"str13 = "{0} a word she can get what she {1} for."str111 = str11.format('With','came');str121 = str12.format(preposition = 'With',verb = 'came')str131 = str13.format('With','came')print(str111)print(str121)print(str131)#单独创建file1 = open('F://'+'hello.txt','w')file1.write("Hello world");file1.close()#使用函数创建def text_create(name, msg):  desktop_path = 'F://'  full_path = desktop_path + name + '.txt'  file = open(full_path,'w')  file.write(msg)  file.close()  print('Done')text_create('Yang','hello world') # ????#变量的比较teststr1 = "Hello"teststr2 = "World"teststr3 = "Hello"print(teststr1 in teststr2)print(teststr1 is teststr3)print(bool(teststr1))print(bool(''))print(not teststr1)print(teststr1 < teststr3 and teststr2 > teststr1)print(teststr1 > teststr2 or teststr3 < teststr1)#python逻辑判断学习a = 1b = 3if a < b :  a = 3  b = 2else:  a = 2  b = 3print(a,b);if a < b:  a = 3  b = 2elif a > b:  a = 2  b = 3else:  a = 100  b = 200print(a,b)for i in 1,2,3,4,5,6:  print(i)for string_str in "hello","world","world":  print(string_str)for str1111 in "Hello":  print(str1111)