第五周课后练习题

3.13

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s.upper(): PYTHON STRING
s.lower(): python string
s.find('i'): 10
s.replace('ing','gni'): Python Strgni
s.split(' '): 'Python', 'String'

3.14

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

3.15

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print (format(389,'b')) #110000101
print (format(389,'o')) #605
print (format(389,'d')) #389
print (format(389,'x')) #185
print (format(389,'c')) #b 'c'改为'C'则为B

3.6

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

3.7

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

3.8

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