python作业4

习题3.6

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import time
for i in range(101):
    print("\rStarting...",end="")
    time.sleep(0.1)
print("Done!")

习题3.7

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

习题3.8

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

习题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(' '))

习题3.14

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

习题3.15

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a=389
print("{:b}".format(a))
print("{:o}".format(a))
print("{:d}".format(a))
print("{:x}".format(a))
print("{:c}".format(a))