第五章习题

p115

3.13 

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

3.14

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

3.15

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

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

3.7

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

3.8

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