body={'x':0.3,"Y":1,"Z":0.7} # dict print(body, body["x"] , body.items()) body["b"]='s' cs = body cs.update( {'a':0} ) body['x']=1 print(cs.items()) #cs.shift('a') print(cs) print('ZZZZZZZZZZ') b=[1,2,3] b.append(4) print(b) b=[1,[2,4,(5,6)],3,{"food":"apple", "toy":"bear", "font":['a', 'b', 'c']}] print(b[3]["toy"]) #find bear print(b[3]["font"][1]) #find 'b' print (b[1][2][1] )#find 6 print (b[1][2][1], type(b), type(b[3]["toy"]) , type(b[1][2]), type(b[1][2][1]))#find 6, a= tuple() print(type(a)) a={1,2,2,3,4,4,5,6,2,3,'b'} print(a) print(int(5/3), 5//3, 5.999//3, type(5.222//3), 5%3, 7%3) print(-2/3, -7/3, -7//3, -7%3 ) print(2**3) #2^3 print('') i = 0 i= i +1 def a(): y=1 print("I am form function a", i, y) return b def b(): # i=i+1 print("I am form function b") return a a()()()()()()()()()() print (a(), a()()) x= [1,[2,4],3] #list print (x , id(x), x[1][1]) print('------') x[0] =x[1] print(x , id(x)) x[0] =x[0] +x[1] print (x, id(x)) y=[[1], [2], [3]] z=[1,2,3] y[0]=y[0] +y[1] print (y, id(y), z) y=y+x print(y, id(y)) print('______') z=1,2 u=3,4 print(z[0], id(z), z) z = z + u print(id(u), u, id(z), z) def a(): print("a") def b(): print('b') v= a,b a=10 # x[0]() print (v) from fractions import Fraction #example float number float_num = 0.755 #convert float to fraction fraction = Fraction(float_num).limit_denominator() fraction1 = Fraction(float_num) print(fraction, fraction1, id(fraction), id(fraction1)) v=(True) _v="c" #internal use __v='尸木日' #use for class __v__ = 'ca' #dundan for python system internal use # this is comment print (id(1), id(True)) x=1/3 print (id(x), x ) x=1/3+ 1/3+ 1/3 print(id(x), x, (x), id(v), v) x=0.1 +0.1 +0.1 print(id(x), x, (x), id(v), v) '''耿景瘁 fsdhfkjhag fasjk ''' v="sey" print(id(v), v , id("sey")) x = 0x01 #hex print(id(x), x, id(1)) y=3 print(id(y), y, id(3)) z=1 + 2 print(id(z), z, id(5)) print(id(1.0), id(1.01), id(0.01)) u=(1,2,33) print(id(u), u, id(1), id(2), id(33))