task1_1.py
code:
with open('data1.txt','r',encoding='utf-8')as f:
data=f.readlines()
n=0
print(data)
for line in data:
if not line.strip()=='':
n+=1
print(n)
output:
note:
if delet "not" in line 6, the output will be the spare line
task1_2.py
code:
with open('data1.txt','r',encoding='utf-8')as f:
n_1=0
for line in f:
if not line.strip()=='':
n_1+=1
print(n_1)
output:
task1_3.py
code:
with open('data1.txt','r',encoding='utf-8')as f:
n_1=0
for line in f:
if not line.isspace():
n_1+=1
print(n_1)
output:
task2_1.py
code:
with open('data2.txt', 'r', encoding = 'utf-8') as f:
data = f.read().split('\n')
unique_line_lst = []
for line in data:
if data.count(line) == 2:
unique_line_lst.append(line)
n = len(unique_line_lst)
print(f'data2.txt共{n}行独特行')
for line in unique_line_lst:
print(line)
unique_line_lst = []
for line in data:
if data.count(line) == 1:
unique_line_lst.append(line)
n = len(unique_line_lst)
print(f'data2.txt共{n}行独特行')
for line in unique_line_lst:
print(line)
output:
task3_1.py:
code:
title = ['城市', '人口(万)']
info = [['南京', '850'],
['纽约', '2300'],
['东京', '3800'],
['巴黎', '1000']]
with open('city1.csv', 'w', encoding = 'gbk') as f:
f.write(','.join(title) + '\n') # 写入标题行
for item in info: # 分行写入info
f.write(','.join(item) + '\n')
output:
task3_2.py:
code:
with open('city1.csv', 'r', encoding = 'gbk') as f:
data = f.read()
print(data.rstrip('\n'))
output:
with open('city1.csv', 'r', encoding = 'gbk') as f:
data = f.readlines()
print('data: ')
print(data)
info = [line.strip('\n').split(',') for line in data]
print('info:')
print(info)
output:
task3_4.py:
code:
import csv
title = ['城市', '人口(万)']
info = [['南京', '850'],
['纽约', '2300'],
['东京', '3800'],
['巴黎', '1000']]
with open('city2.csv', 'w', encoding = 'gbk', newline = '') as f:
f_writer = csv.writer(f) # 为文件对象f创建一个writer对象(necessary)
f_writer.writerow(title) # 通过writer对象的方法writerow()写入一行(标题行）
f_writer.writerows(info) # 通过writer对象的方法writerows()写入多行(注意row和rows)
output:
task3_5.py:
code:
import csv
with open('city2.csv', 'r', encoding = 'gbk') as f:
f_reader = csv.reader(f) # 为文件对象f创建一个reader对象
for line in f_reader:
print(line)
print(f_reader)
output:
task4.py:
code:
import os
print(os.path.basename(os.getcwd()))
# 将当前路径下所有.py文件名保存到py_file_lst中
py_file_lst = [file for file in os.listdir() if file.endswith('.py')]
# 遍历输出
print(py_file_lst)
for number, file in enumerate(py_file_lst, 1):
print(f'{number:-3d}. {file}')
output:
task6.py
code:
with open('data6.csv','r',encoding = 'gbk') as f:old_data = f.read().split('\n')
del old_data[0]
new_data = []
for i in range(len(old_data)-1):
if eval(old_data[i]) + float(0.5) >= int(eval(old_data[i])) + 1:
new_data.append(str(int(eval(old_data[i]))+1))
else:
new_data.append(str(int(eval(old_data[i]))))
title = ['原始数据','四舍五入后数据']
data = []
for i in range(len(old_data)-1):
data.append([old_data[i],new_data[i]])
with open('data6.csv','w',encoding = 'gbk') as f:
f.write(','.join(title) + '\n')
for i in data:
f.write(','.join(i) + '\n')
output：
task7.py
code:
with open('data7.csv','r',encoding = 'gbk') as f:
info = f.read().split('\n')
del info[0]
major_dict = {}
for i in info:
person_list = i.split(',')
major_dict[i] = person_list[2]
items = [[k,v] for k,v in major_dict.items()]
items.sort(key=lambda x:x[1])
majors_count = 1
majors_list = []
for i in range(len(items)-1):
if items[i+1][1] == items[i][1] and items[i][1] not in majors_list:
majors_list.append(items[i][1])
pass
elif items[i+1][1] == items[i][1] and items[i][1] in majors_list:
pass
else:
majors_list.append(items[i+1][1])
majors_count += 1
for i in range(majors_count):
x = locals()[f'major{i+1}'] = []
for j in range(len(items)):
if items[j][1] == majors_list[i]:
x.append(items[j][0])
else:
pass
score_dict1 = {}
for i in major1:
person_list = i.split(',')
score_dict1[i] = person_list[3]
items1 = [[k,v] for k,v in score_dict1.items()]
items1.sort(key=lambda x:x[1],reverse = True)
score_dict2 = {}
for i in major2:
person_list = i.split(',')
score_dict2[i] = person_list[3]
items2 = [[k,v] for k,v in score_dict2.items()]
items2.sort(key=lambda x:x[1],reverse = True)
together = items1 + items2
final_data = [i[0] for i in together]
final_list = []
for i in final_data:
person_list = i.split(',')
final_list.append(person_list)
print(final_list)
title = ['学号','姓名','专业','分数']
with open('data7.csv', 'w', encoding = 'gbk') as f:
f.write(','.join(title) + '\n')
for item in final_list:
f.write(','.join(item) + '\n')
output:
[['1007', '小李子', 'Acting', '92'], ['1008', '甜茶', 'Acting', '91'], ['1006', '裘花', 'Acting', '89'], ['1009', '囧瑟夫', 'Acting', '88'], ['1005', '无脸男', 'Acting', '85'], ['1004', '大眼仔', 'Acting', '82'], ['1001', '抖森', 'Acting', '80'], ['1003', '毛怪', 'Acting', '75'], ['1002', '宝爷', 'Music', '97'], ['1010', '霉霉', 'Music', '96']]
task8.py
code:
lines_count = 0
words_count = 0
chrs_count = 0
space_count = 0
with open('hamlet.txt','r',encoding = 'utf-8') as f:
for line in f:
words = line.split()
lines_count += 1
words_count += len(words)
chrs_count += len(line)
for i in list(line):
if i == ' ':
space_count += 1
else:
pass
print('行数:',lines_count)
print('单词数:',words_count)
print('字符数:',chrs_count)
print('空格数:',space_count)
with open('hamlet.txt','r',encoding = 'utf-8') as f:text = f.readlines()
for i in range(len(text)):
if text[i]:
text[i] = str(i+1) + ' ' + text[i]
with open('hamlet.txt','w',encoding = 'utf-8') as f:
f.writelines(text)
output:
task9.py
code:
def is_valid(p_id):
if len(p_id) != 18:
return False
else:
a = p_id[-1]
b = p_id[:-1]
if b.isdigit() == True and a == 'X' or p_id.isdigit() == True:
return True
else:
return False
with open('data9_id.txt','r',encoding = 'utf-8') as f:
info = f.read().split('\n')
del info[0]
id_list = []
for i in info:
x = i.split(',')
if x[0] not in id_list and is_valid(x[1]) == True:
id_list.append([x[0],x[1]])
import datetime
t = datetime.datetime.now()
year_now = int(t.strftime('%Y%m%d')[0:4])
month_now = int(t.strftime('%Y%m%d')[4:6])
day_now = int(t.strftime('%Y%m%d')[6:8])
year_dict = {}
for i in range(len(id_list)):
p_id = id_list[i][1]
year = int(p_id[6:10])
month = int(p_id[10:12])
day = int(p_id[12:14])
p_info = id_list[i][0] + ',' + str(year) + '-' + str(month) + '-' + str(day) + ','
if month <= month_now and day < day_now:
year_dict[p_info] = year_now - year - 1
else:
year_dict[p_info] = year_now - year
print('姓名，出生日期，年龄')
items = [[k,v] for k,v in year_dict.items()]
items.sort(key=lambda x:x[1],reverse = True)
for i in items:
print(f'{i[0]}{i[1]}')
output:
task10_1.py
code:
print(f"{'抽点开始':*^40}")
import random as r
with open('data10_stu.txt','r',encoding = 'utf-8') as f:
stu = f.readlines()
def the_lucky_dogs(n):
stu_list = []
while True:
if n != 0:
i = r.randint(0,len(stu)-1)
if stu[i] not in stu_list:
stu_list.append(stu[i])
print(stu[i])
n -= 1
else:
pass
else:
print(f"{'抽点结束':*^40}")
break
n = int(input('输入随机抽点人数:'))
the_lucky_dogs(n)
output:
task10_2.py
code:
print(f"{'抽点开始':*^40}")
import random as r
with open('data10_stu.txt','r',encoding = 'utf-8') as f:
stu = f.readlines()
def the_lucky_dogs(n):
stu_list = []
while True:
if n != 0:
i = r.randint(0,len(stu)-1)
if stu[i] not in stu_list:
stu_list.append(stu[i])
print(stu[i])
n -= 1
else:
pass
else:
break
for i in stu_list:
stu.remove(i)
while True:
n = int(input('输入随机抽点人数:'))
if n != 0:
the_lucky_dogs(n)
else:
print(f"{'抽点结束':*^40}")
break
output:
标签：stu,31,py,list,print,202283820011,吴曦,line,data From： https://www.cnblogs.com/Luke-FOX-31415926/p/17445403.html