python第五周练习题

思考与练习
3.13

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s = "Python String"
print(s.upper())
print(s.lower())
print(s.find('i'))
print(s.replace('ing','gni'))
print(s.split(' '))

3.14

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print("{:>15s}:{:<8.2f}".format("Length",23.87501))

3.15

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print("{0:b}".format(389))
print("{0:o}".format(389))
print("{0:d}".format(389))
print("{0:x}".format(389))
print(chr(389))

p125
3.6文本进度条

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import time
step = 10
print("Starting")
for i in range(step + 1):
    a,b = '**'*i,'..'*(step - i)
    c = (i/step) * 100
    print("&{:>3.0f}[{}->{}]".format(c,a,b))
    time.sleep(0.1)
print("Done!")

3.7文本风格

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while True:
    for i in ["/","-","|","\\","|"]:
        print("%s\r" % i,end='')

3.8工具库

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from tqdm import tqdm
from time import sleep
for i in tqdm(range(1,100)):
    sleep(0.01)