Lesson02
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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()()()()()()()()()()
x= [1,[2],3]
print (x , id(x))
x[0] =x[1]
print(x , id(x))
x[0] =x[0] +x[1]
print (x, id(x))
y=[[1], [2], [3]]
y[0]=y[0] +y[1]
print (y, id(y))
y=y+x
print(y, id(y))
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) #Tuples cannot modify value
print(id(u), u, id(1), id(2), id(33))
print(int(5/3))
print(5//3)
print((5/3))
print((5.99999/3))
print((5//3.0))
print(type(5.99999/3))
print(-7%3)
print(-7/3)
print(7**3)
Python
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