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ch20 cleanup and f-strings

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Miroslav Šedivý
2021-02-13 19:35:34 +01:00
parent c5114a5679
commit 1a0da424e2
14 changed files with 35 additions and 37 deletions
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1
20-concurrency/primes/primes.py
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@@ -2,7 +2,6 @@
import math import math
PRIME_FIXTURE = [ PRIME_FIXTURE = [
(2, True), (2, True),
(142702110479723, True), (142702110479723, True),

6
20-concurrency/primes/procs.py
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@@ -6,11 +6,11 @@ can be faster than sequential code for CPU-intensive work.
""" """
# tag::PRIMES_PROC_TOP[] # tag::PRIMES_PROC_TOP[]
import sys
from time import perf_counter from time import perf_counter
from typing import NamedTuple from typing import NamedTuple
from multiprocessing import Process, SimpleQueue, cpu_count # <1> from multiprocessing import Process, SimpleQueue, cpu_count # <1>
from multiprocessing import queues # <2> from multiprocessing import queues # <2>
import sys
from primes import is_prime, NUMBERS from primes import is_prime, NUMBERS
@@ -60,8 +60,8 @@ def main() -> None:
if jobs.empty(): # <9> if jobs.empty(): # <9>
break break
time = perf_counter() - t0 elapsed = perf_counter() - t0
print('Total time:', f'{time:0.2f}s') print(f'Total time: {elapsed:.2f}s')
if __name__ == '__main__': if __name__ == '__main__':
main() main()

6
20-concurrency/primes/procs_py37.py
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@@ -1,6 +1,6 @@
# tag::PRIMES_PROC_TOP[] # tag::PRIMES_PROC_TOP[]
from time import perf_counter from time import perf_counter
from typing import Tuple, List, NamedTuple from typing import List, NamedTuple
from multiprocessing import Process, SimpleQueue # <1> from multiprocessing import Process, SimpleQueue # <1>
from primes import is_prime, NUMBERS from primes import is_prime, NUMBERS
@@ -34,8 +34,8 @@ def main() -> None:
label = 'P' if prime else ' ' label = 'P' if prime else ' '
print(f'{n:16} {label} {elapsed:9.6f}s') print(f'{n:16} {label} {elapsed:9.6f}s')
time = perf_counter() - t0 elapsed = perf_counter() - t0
print('Total time:', f'{time:0.2f}s') print(f'Total time: {elapsed:.2f}s')
if __name__ == '__main__': if __name__ == '__main__':

2
20-concurrency/primes/sequential.py
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@@ -28,7 +28,7 @@ def main() -> None:
print(f'{n:16} {label} {elapsed:9.6f}s') print(f'{n:16} {label} {elapsed:9.6f}s')
elapsed = perf_counter() - t0 # <4> elapsed = perf_counter() - t0 # <4>
print('Total time:', f'{elapsed:0.2f}s') print(f'Total time: {elapsed:.2f}s')
if __name__ == '__main__': if __name__ == '__main__':
main() main()

2
20-concurrency/primes/spinner_prime_async_broken.py
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@@ -24,7 +24,7 @@ async def check(n: int) -> int:
async def supervisor(n: int) -> int: async def supervisor(n: int) -> int:
spinner = asyncio.create_task(spin('thinking!')) # <1> spinner = asyncio.create_task(spin('thinking!')) # <1>
print('spinner object:', spinner) # <2> print(f'spinner object: {spinner}') # <2>
result = await check(n) # <3> result = await check(n) # <3>
spinner.cancel() # <5> spinner.cancel() # <5>
return result return result

2
20-concurrency/primes/spinner_prime_async_nap.py
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@@ -43,7 +43,7 @@ async def check(n: int) -> int:
async def supervisor(n: int) -> int: async def supervisor(n: int) -> int:
spinner = asyncio.create_task(spin('thinking!')) # <1> spinner = asyncio.create_task(spin('thinking!')) # <1>
print('spinner object:', spinner) # <2> print(f'spinner object: {spinner}') # <2>
result = await check(n) # <3> result = await check(n) # <3>
spinner.cancel() # <5> spinner.cancel() # <5>
return result return result

4
20-concurrency/primes/spinner_prime_proc.py
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@@ -4,9 +4,9 @@
# multiprocessing example in the python-list: # multiprocessing example in the python-list:
# https://mail.python.org/pipermail/python-list/2009-February/675659.html # https://mail.python.org/pipermail/python-list/2009-February/675659.html
import itertools
from multiprocessing import Process, Event from multiprocessing import Process, Event
from multiprocessing import synchronize from multiprocessing import synchronize
import itertools
from primes import is_prime from primes import is_prime
@@ -26,7 +26,7 @@ def supervisor(n: int) -> int: # <1>
done = Event() # <2> done = Event() # <2>
spinner = Process(target=spin, spinner = Process(target=spin,
args=('thinking!', done)) # <3> args=('thinking!', done)) # <3>
print('spinner object:', spinner) # <4> print(f'spinner object: {spinner}') # <4>
spinner.start() # <5> spinner.start() # <5>
result = check(n) # <6> result = check(n) # <6>
done.set() # <7> done.set() # <7>

4
20-concurrency/primes/spinner_prime_thread.py
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@@ -4,8 +4,8 @@
# multiprocessing example in the python-list: # multiprocessing example in the python-list:
# https://mail.python.org/pipermail/python-list/2009-February/675659.html # https://mail.python.org/pipermail/python-list/2009-February/675659.html
from threading import Thread, Event
import itertools import itertools
from threading import Thread, Event
from primes import is_prime from primes import is_prime
@@ -25,7 +25,7 @@ def supervisor(n: int) -> int: # <1>
done = Event() # <2> done = Event() # <2>
spinner = Thread(target=spin, spinner = Thread(target=spin,
args=('thinking!', done)) # <3> args=('thinking!', done)) # <3>
print('spinner object:', spinner) # <4> print(f'spinner object: {spinner}') # <4>
spinner.start() # <5> spinner.start() # <5>
result = check(n) # <6> result = check(n) # <6>
done.set() # <7> done.set() # <7>

10
20-concurrency/primes/threads.py
View File

@@ -5,12 +5,12 @@ threads.py: shows that Python threads are slower than
sequential code for CPU-intensive work. sequential code for CPU-intensive work.
""" """
import os
import sys
from queue import SimpleQueue
from time import perf_counter from time import perf_counter
from typing import NamedTuple from typing import NamedTuple
from threading import Thread from threading import Thread
from queue import SimpleQueue
import sys
import os
from primes import is_prime, NUMBERS from primes import is_prime, NUMBERS
@@ -58,8 +58,8 @@ def main() -> None:
if jobs.empty(): # <8> if jobs.empty(): # <8>
break break
time = perf_counter() - t0 elapsed = perf_counter() - t0
print('Total time:', f'{time:0.2f}s') print(f'Total time: {elapsed:.2f}s')
if __name__ == '__main__': if __name__ == '__main__':
main() main()

10
20-concurrency/primes/threads_py37.py
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@@ -1,7 +1,7 @@
from time import perf_counter
from typing import List, NamedTuple
from threading import Thread
from queue import SimpleQueue from queue import SimpleQueue
from time import perf_counter
from threading import Thread
from typing import List, NamedTuple
from primes import is_prime, NUMBERS from primes import is_prime, NUMBERS
@@ -32,8 +32,8 @@ def main() -> None:
label = 'P' if prime else ' ' label = 'P' if prime else ' '
print(f'{n:16} {label} {elapsed:9.6f}s') print(f'{n:16} {label} {elapsed:9.6f}s')
time = perf_counter() - t0 elapsed = perf_counter() - t0
print('Total time:', f'{time:0.2f}s') print(f'Total time: {elapsed:.2f}s')
if __name__ == '__main__': if __name__ == '__main__':
main() main()

4
20-concurrency/spinner_async.py
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@@ -27,11 +27,11 @@ async def slow() -> int:
# tag::SPINNER_ASYNC_START[] # tag::SPINNER_ASYNC_START[]
def main() -> None: # <1> def main() -> None: # <1>
result = asyncio.run(supervisor()) # <2> result = asyncio.run(supervisor()) # <2>
print('Answer:', result) print(f'Answer: {result}')
async def supervisor() -> int: # <3> async def supervisor() -> int: # <3>
spinner = asyncio.create_task(spin('thinking!')) # <4> spinner = asyncio.create_task(spin('thinking!')) # <4>
print('spinner object:', spinner) # <5> print(f'spinner object: {spinner}') # <5>
result = await slow() # <6> result = await slow() # <6>
spinner.cancel() # <7> spinner.cancel() # <7>
return result return result

4
20-concurrency/spinner_async_experiment.py
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@@ -25,7 +25,7 @@ async def slow() -> int:
async def supervisor() -> int: async def supervisor() -> int:
spinner = asyncio.create_task(spin('thinking!')) # <1> spinner = asyncio.create_task(spin('thinking!')) # <1>
print('spinner object:', spinner) # <2> print(f'spinner object: {spinner}') # <2>
result = await slow() # <3> result = await slow() # <3>
spinner.cancel() # <5> spinner.cancel() # <5>
return result return result
@@ -33,7 +33,7 @@ async def supervisor() -> int:
def main() -> None: def main() -> None:
result = asyncio.run(supervisor()) result = asyncio.run(supervisor())
print('Answer:', result) print(f'Answer: {result}')
if __name__ == '__main__': if __name__ == '__main__':
main() main()

8
20-concurrency/spinner_proc.py
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@@ -5,10 +5,10 @@
# https://mail.python.org/pipermail/python-list/2009-February/675659.html # https://mail.python.org/pipermail/python-list/2009-February/675659.html
# tag::SPINNER_PROC_IMPORTS[] # tag::SPINNER_PROC_IMPORTS[]
from multiprocessing import Process, Event # <1>
from multiprocessing import synchronize # <2>
import itertools import itertools
import time import time
from multiprocessing import Process, Event # <1>
from multiprocessing import synchronize # <2>
def spin(msg: str, done: synchronize.Event) -> None: # <3> def spin(msg: str, done: synchronize.Event) -> None: # <3>
# end::SPINNER_PROC_IMPORTS[] # end::SPINNER_PROC_IMPORTS[]
@@ -29,7 +29,7 @@ def supervisor() -> int:
done = Event() done = Event()
spinner = Process(target=spin, # <4> spinner = Process(target=spin, # <4>
args=('thinking!', done)) args=('thinking!', done))
print('spinner object:', spinner) # <5> print(f'spinner object: {spinner}') # <5>
spinner.start() spinner.start()
result = slow() result = slow()
done.set() done.set()
@@ -39,7 +39,7 @@ def supervisor() -> int:
def main() -> None: def main() -> None:
result = supervisor() result = supervisor()
print('Answer:', result) print(f'Answer: {result}')
if __name__ == '__main__': if __name__ == '__main__':

9
20-concurrency/spinner_thread.py
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@@ -5,9 +5,9 @@
# https://mail.python.org/pipermail/python-list/2009-February/675659.html # https://mail.python.org/pipermail/python-list/2009-February/675659.html
# tag::SPINNER_THREAD_TOP[] # tag::SPINNER_THREAD_TOP[]
from threading import Thread, Event
import itertools import itertools
import time import time
from threading import Thread, Event
def spin(msg: str, done: Event) -> None: # <1> def spin(msg: str, done: Event) -> None: # <1>
for char in itertools.cycle(r'\|/-'): # <2> for char in itertools.cycle(r'\|/-'): # <2>
@@ -26,9 +26,8 @@ def slow() -> int:
# tag::SPINNER_THREAD_REST[] # tag::SPINNER_THREAD_REST[]
def supervisor() -> int: # <1> def supervisor() -> int: # <1>
done = Event() # <2> done = Event() # <2>
spinner = Thread(target=spin, spinner = Thread(target=spin, args=('thinking!', done)) # <3>
args=('thinking!', done)) # <3> print(f'spinner object: {spinner}') # <4>
print('spinner object:', spinner) # <4>
spinner.start() # <5> spinner.start() # <5>
result = slow() # <6> result = slow() # <6>
done.set() # <7> done.set() # <7>
@@ -37,7 +36,7 @@ def supervisor() -> int: # <1>
def main() -> None: def main() -> None:
result = supervisor() # <9> result = supervisor() # <9>
print('Answer:', result) print(f'Answer: {result}')
if __name__ == '__main__': if __name__ == '__main__':
main() main()