python 基础

Python 中的变量赋值不需要类型声明。

print("---------------------------------数字---------------------------------")

num1 = 1;

print("---------------------------------字符串---------------------------------")

str1 = "str";


print("---------------------------------列表---------------------------------")

print("
 切割可以用  [头下标:尾下标] ")
list1 = [1,2,3,4,5,6,7,8,9]
list1[1] = 3
print(list1)
print(list1[:])
print(list1[3:])
print(list1[:5])
print(list1[1:9])
print(list1[1:-5])

print("---------------------------------元组---------------------------------")
print("
 元组用 () 标识。内部元素用逗号隔开。但是元组不能二次赋值，相当于只读列表。")
tuple1 = ("a",2,"b",4,"c")
print(tuple1)
print("其他截取通list")

print("---------------------------------字典-----------map----------------------")

dict1 = {}
dict1['one'] = "This is one"
dict1[2] = "This is two"
tinyDict = {'name': 'john','code':6734, 'dept': 'sales'}
print(dict1['one'])
print(dict1[2])
print(dict1.keys())
print(dict1.values())


for循环：

def testFor(self):
    fruits = ['banana', 'apple', 'mango']
    for i in fruits:
        print(i)
while:

def testWhile(self):
    fruits = ['banana', 'apple', 'mango']
    __ind = len(fruits)
    print("len",__ind)
    __i = 0;
    while(__i < __ind):
        print(fruits[__i])
        __i += 1



静态方法：用 @staticmethod修饰

@staticmethod
def staticMethod():
    print('staticMethod')

   python 中 ==和is的区别