python实现进度条

最近在写python的项目,为了美观想加一个进度条,正好这里收集一下找到的众多可用例子

因为只是装饰作用,就没收集带第三方库的代码

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
#!/usr/bin/env python3
import time


class Index(object):
def __init__(self, number=50, decimal=2):
"""
:param decimal: 你保留的保留小数位
:param number: # 号的 个数
"""
self.decimal = decimal
self.number = number
self.a = 100 / number # 在百分比 为几时增加一个 # 号

def __call__(self, now, total):
# 1. 获取当前的百分比数
percentage = self.percentage_number(now, total)

# 2. 根据 现在百分比计算
well_num = int(percentage / self.a)
# print("well_num: ", well_num, percentage)

# 3. 打印字符进度条
progress_bar_num = self.progress_bar(well_num)

# 4. 完成的进度条
result = "\r%s %s" % (progress_bar_num, percentage)
return result

def percentage_number(self, now, total):
"""
计算百分比
:param now: 现在的数
:param total: 总数
:return: 百分
"""
return round(now / total * 100, self.decimal)

def progress_bar(self, num):
"""
显示进度条位置
:param num: 拼接的 “#” 号的
:return: 返回的结果当前的进度条
"""
# 1. "#" 号个数
well_num = "#" * num

# 2. 空格的个数
space_num = " " * (self.number - num)

return '[%s%s]' % (well_num, space_num)


index = Index()

start = 371
for i in range(start + 1):
print(index(i, start), end='')
time.sleep(0.01)
# \r 返回本行开头
# end : python 结尾不加任何操作, 默认是空格

效果图:

1
2
3
4
import time
for i in range(5):
time.sleep(0.3)
print(str(i)*10)

效果图

1
2
3
4
5
6
7
import time
import sys
for i in range(8):
time.sleep(0.3)
print('\r', end='')
print(str(i)*10, end='')
sys.stdout.flush()

效果图

1
2
3
4
5
6
7
8
9
import time
import sys
n = 10
for i in range(n):
time.sleep(0.3)
sys.stdout.write('\r')
sys.stdout.write(str(i)*(n-i))
sys.stdout.flush()
sys.stdout.write('n')

效果图

1
2
3
4
5
6
7
8
9
10
11
import time
import sys
def progress_test():
bar_length=20
for percent in range(0, 101):
hashes = '#' * int(percent/100.0 * bar_length)
spaces = ' ' * (bar_length - len(hashes))
sys.stdout.write("\rPercent: [%s] %d%%"%(hashes + spaces, percent))
sys.stdout.flush()
time.sleep(1)
progress_test()

效果图