Learning Python-Basic course: Day 21, Summary of the week and dictionary exercises.

a={1:10, 2:20}
b={3:30, 4:40}
c={}
for i in (a,b): 
    #for every element in dictionary a AND dictionary b,
    c.update(i)
    #update the dictionary to include these values.
print(c)

{1: 10, 2: 20, 3: 30, 4: 40}

a={1:10, 2:20}
b={3:30, 4:40 , 2:60}
c={}
d={}
for i in (a,b): 
    c.update(i)
print(c)
for i in (b,a): 
    d.update(i)
print(d)

{1: 10, 2: 60, 3: 30, 4: 40}
{1: 10, 2: 20, 3: 30, 4: 40}

a = {
  "a":1,
  "b":2,
  "c":3,
  "e":4
}
# Replace 'e' by 'd'

a["d"] = a.pop("e")
print(a)

{'b': 2, 'a': 1, 'c': 3, 'd': 4}