python 核心程式設計第二版9章習題答案(自寫)
阿新 • • 發佈:2019-02-05
test 9.1
fileload = 'C:/Users/Administrator/Desktop/test/test9.1.txt'
f = open(fileload,'r')
for eachline in f:
for ps in eachline:
if ps == '#':
print("is pass:%s"%ps)
break
else:
print(ps,end = '')
f.close()
test 9.2
import os
fileload = 'C:/Users/Administrator/Desktop/test'
list = os.listdir(fileload)
print("*****************")
for i in list:
print(i)
print("*****************")
N = int(input("******N = how many line you want:"))
F = input("which file you want:")
fileload_ = fileload + '/'+ F
f = open(fileload_,'r')
for lines in f:
print(lines,end = ' ')
N=N-1
if N<=0:
break
f.close()
test 9.3
import os
fileload = 'C:/Users/Administrator/Desktop/test'
list = os.listdir(fileload)
print("*****************")
for i in list:
print(i)
print("*****************")
F = input("which file you want:")
fileload_ = fileload + '/'+ F
count = 0
f = open(fileload_,'r' )
for lines in f:
count+=1
print("this file lines is:%d"%count)
f.close()
test 9.4
import os
file_load = '/home/zz/Desktop/test'
print("This directory file is:", os.listdir(file_load))
while True:
file_name = input("Enter a file name OR Enter exit to quit:")
load = file_load + '/' + file_name
if file_name == 'exit':
break
f = open(load)
count = 0
for i in f:
print(i, end='')
count += 1
if count > 25:
break
continue
test 9.5
pass
test 9.6
import os
file_load = '/home/zz/Desktop/test'
print("This directory file is:", os.listdir(file_load))
a = input("first file you want to compare:")
b = input("second file you want to compare:")
a_load = file_load+'/'+a
b_load = file_load+'/'+b
f_a =open(a_load)
a_lines= f_a.readlines()
f_a.close()
f_b =open(b_load)
b_lines= f_b.readlines()
f_a.close()
print(a_lines)
print(b_lines)
count_column=0
count_line= min(len(a_lines),len(b_lines))
for i in range(0,count_line):
if a_lines[i] == b_lines[i]:
print("%d line is simple,first is:%s second is:%s"%(i+1,a_lines[i],b_lines[i]),end='')
else:
for at in range(min(len(a_lines[i]),len(b_lines[i]))):
if a_lines[i][at] != b_lines[i][at]:
print("%d line %d column is different,first is:%s second is:%s" %(i+1,at+1,a_lines[i],b_lines[i]),end='')
break
test 9.8
'''
Get a named attribute from an object; getattr(x, 'y') is equivalent to x.y.
When a default argument is given, it is returned when the attribute doesn't
exist; without it, an exception is raised in that case'''
#getattr(object, name[, default]) -> value
mod = input("enter module name:")
module = __import__(mod)
m = dir(module)
for i in m:
print("name :%s"%i)
print(type(getattr(module,i)))
print(getattr(module,i))