The basic data type conversion python

Data type conversion

1. Can be converted to a digital numeric string may be converted to a string, but when a particular type of non-numeric string, is converted into digital integer result can not be estimated
2. String can be converted to a Boolean value, only the '' means to false, the rest are true, note '' is not a string of spaces
3. Integer can also be converted to a Boolean value, 0 represents only false, the rest are true
4. Can be converted to Boolean strings and numbers, true is 1, 'true' false is 'false', 0

 

Small knowledge:

Digital converter to a string # 
# = Val 666 
# STR Val = (Val) 
# Print (Val) 
# string-to-digital 
# Val = "666" 
# Val = int (Val) 
# Print (Val) 

# digital-to Boolean 0 It is to false 
# 666 = val1 is 
# val2 = BOOL (val1 is) 
# Print (val2) 


# transfected Boolean string "" as Fase 
# = val1 is ". 1" 
# val2 = BOOL (val1 is) 
# Print (val2) 

# other Boolean transformation 

" "" 
val1 is True = 
val2 = STR (val1 is) 
Print (val2) 

to true is 1, false is 0 
val1 is True = 
val2 = int (val1 is) 
Print (val2) 
"" "
# value = 10 or 2
# print(value)
#
# value = 0 or 2
# print(value)
#
# value = 1 or 0
# print(value)
    For and, if they value = 1 and 9 such a case     if the first value is converted to a boolean value True, the second value = value.     If the first value is converted to a boolean value False, then the first value = value.































    And if there are a plurality of conditions, the above-described process from left to right. 
    Example: 
        V1 =. 9. 1 and 
        V2 = 0. 1 and 
        V3 = 0. 7 and 
        V4 = 0 and "" 
        V5 = 0 and. 9. 1 and 
        
        
# integrated 
# look and look or 
#. 1 and V1 = 0. 9 and. 6 or 
# print (v1)