# File: ChapterLists/increment.py
"""Check if interger with isinstance(n,int)
   Increment each element in a list. Different methods
"""
def inclist(L):                 # increment all numbers in a list by index
    for i in range(len(L)):     # be sure to convert list to an int list
        L[i] = L[i] + 1
    return L

def increment(L): # increment all numbers in a list
    r = []
    for x in L:
        r.append(x + 1)         
    return r

def incMap(L):  # apply the increment function to all 
    return list(map(lambda x: (x + 1), L)) 

def onlyInts(L): # increment only numbers from a list
    res = []
    for x in L:
        if isinstance(x,int):
            res.append(x + 1)
    return res

def main(): # try all methods
     # reads a string then splits with blank and 
    myL = input( "Input a list of integers( EX: 2 3 0[ENTER])?" ).split(" ") # makes ['2','3','0']
    myL = [int(x) for x in myL ] # converts to a list of integers
    print(myL)
    print("increment list:",  inclist(myL) ) #list has changed
    print("increment list:",  increment(myL))
    print("increment list:",  incMap(myL)) # [6, 7] incremented list: [7, 8]
    print(onlyInts([1,2,'a','b',3])) #[2, 3, 4]
    
main()