from math import isnan

# looping through dictionaries

'''tel = {"abc":9877,"def":9563}

for k,v in tel.items():

print(k,v)'''

# looping with two or more sequences

from builtins import print

'''que = ["name","nick name","favourite person"]

ans = ["deep","DD","My MoM"]

sign = [".","!","!"]

for q,a,s in zip(que,ans,sign):

print("what is your {0}? It is {1}{2}".format(q,a,s))'''

# loop over a sequence in reverse

'''for i in reversed(range(1,11)):

print(i)'''

# loop over a sequence in sorted order

'''fruits = ['apple', 'orange', 'apple', 'pear', 'orange', 'banana']

# if we are sorting list we will have a duplicate value

for i in sorted(set(fruits)) :

print(i)'''

# manipulating a list while iterating

raw_data = [56.2, float('NaN'), 51.7, 55.3, 52.5, float('NaN'), 47.8]

data = []

for i in raw_data:

if not isnan(i):

data.append(i)

print("filtered data : ",data)