Python專案實踐 文字進度條

採用字串方式列印可以動態變化的文字進度條

# textprobarv1.py

import time
scale =
10print
("------執行開始------"
)for i in
range
(scale +1)
: a =
"*"* i
b ="-"*
(scale - i)
c =(i / scale)
*100
print
("%[{}->{}]"
.format
(c, a, b)
) time.sleep(
0.1)
print
("------執行結束------"
重新整理的本質：用後列印的字元覆蓋之前的字元
# textprobarv2.py

import time
for i in
range
(101):
print
("\r%"
.format
(i), end="")
time.sleep(
0.1)

# textprobarv3.py

import time
scale =
50print
("執行開始"
.center(scale //2,
"-")
)start = time.perf_counter(
)for i in
range
(scale +1)
: a =
"*"* i
b ="-"*
(scale - i)
c =(i / scale)
*100
dur = time.perf_counter(
)- start
print
("\r%[{}->{}]s"
.format
(c, a, b, c)
, end="")
time.sleep(
0.1)
print
("\n"
+"執行結束"
文字進度條程式使用了time.perf_counter()計時計時 
進度條
# textprobarv4.py

import time
from math import sin
scale =
50print
("執行開始"
.center(scale //2,
"-")
)start = time.perf_counter(
)for i in
range
(scale +1)
: x = i +(1
- sin(i *
3.14*2
+3.14/2
))/-
8 a =
"*"*
int(x)
b ="-"*
(scale -
int(x)
) c =
(i / scale)
*100
dur = time.perf_counter(
)- start
# print("\r%[{}->{}]耗時s".format(c, a, b, c), end="")
print
("\r%[{}->{}]"
.format
(c, a, b)
, end="")
time.sleep(
0.1)
print
("\n"
+"執行結束"
.center(scale //2,
"-")
)
power：speeds up

# textprobarv4.py

import time
scale =
10print
("執行開始"
.center(scale //2,
"-")
)start = time.perf_counter(
)for i in
range
(scale +1)
: x =
(i +(1
- i)
*0.03)**
2 a =
"*"*
int(x)
b ="-"*
(scale -
int(x)
) c =
(i / scale)
*100
dur = time.perf_counter(
)- start
# print("\r%[{}->{}]耗時s".format(c, a, b, dur), end="")
print
("\r%[{}->{}]s"
.format
(c, a, b, dur)
, end="")
time.sleep(
0.4)
print
("\n"
+"執行結束"
.center(scale //2,
"-")
)
# progressbarv5.py

progressbefore =
0def
printprogressbar
(percent, prefix ='')
:global progressbefore
if percent - progressbefore <
0.001
:# 只有當進度達到千分之一才重新整理，避免頻繁重新整理進度條
return
progressbefore = percent
percentstr ="".
format
(percent*
100) 
filledlength =
int(
30* percent)
bar =
'█'* filledlength +
'-'*(30
- filledlength)
print
('\r%s |%s| %s%% '
%(prefix, bar, percentstr)
, end='')
if __name__ ==
"__main__"
:import time
for i in
range
(1000):
printprogressbar(
(i+1)/
1000
, prefix=
"progress:"
) time.sleep(
0.01
)# 當前程序暫停0.01s
ps：參閱python123.i
 
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