字典生成式

字典生成式

import random
stuInfo = {}
for i in range(20):
    name = 'westos' + str(i)
    score = random.randint(60, 100)
    stuInfo[name] = score
print(stuInfo)
highscore = {}
for name, score in stuInfo.items():
    if score > 90:
        highscore[name] = score
print(highscore)
print({name: score for name, score in stuInfo.items() if score > 90})

d = dict(a=1, b=2)
print(d)
new_d = {}
for i in d:
    new_d[i.upper()] = d[i]
print(new_d)
print({k.upper(): v for k, v in d.items()})

d = dict(a=1, b=2, c=3, B=8, A=11)
# a:12 b:10  c:3
new_d = {}
for k, v in d.items():
    low_k = k.lower()
    if low_k not in new_d:
        new_d[low_k] = v
    else:
        new_d[low_k] += v
print(new_d)
print({k.lower(): d.get(k.upper(), 0) +
                  d.get(k.lower(), 0) for k in d})