从txt中提取数据

Question

我有一个模拟日志，如下所示：

Time = 1

smoothSolver:  Solving for Ux, Initial residual = 1, Final residual = 0.0289664, No Iterations 2
smoothSolver:  Solving for Uy, Initial residual = 1, Final residual = 0.028966, No Iterations 2
smoothSolver:  Solving for Uz, Initial residual = 1, Final residual = 0.0842607, No Iterations 1
GAMG:  Solving for p, Initial residual = 1, Final residual = 0.0471791, No Iterations 120
time step continuity errors : sum local = 0.000235896, global = -4.03834e-05, cumulative = -4.03834e-05
smoothSolver:  Solving for epsilon, Initial residual = 0.239416, Final residual = 0.0154473, No Iterations 1
smoothSolver:  Solving for k, Initial residual = 1, Final residual = 0.0534371, No Iterations 2
ExecutionTime = 9.27 s  ClockTime = 10 s

我想使用python提取Ux、Uy、Uz、p、epsilon和k的初始值，并将它们存储在数组中。如何在python中实现这一点？

Answer 1

您可以通过标准包re使用正则表达式。

import re

log = """
Time = 1

smoothSolver:  Solving for Ux, Initial residual = 1, Final residual = 0.0289664, No Iterations 2
smoothSolver:  Solving for Uy, Initial residual = 1, Final residual = 0.028966, No Iterations 2
smoothSolver:  Solving for Uz, Initial residual = 1, Final residual = 0.0842607, No Iterations 1
GAMG:  Solving for p, Initial residual = 1, Final residual = 0.0471791, No Iterations 120
time step continuity errors : sum local = 0.000235896, global = -4.03834e-05, cumulative = -4.03834e-05
smoothSolver:  Solving for epsilon, Initial residual = 0.239416, Final residual = 0.0154473, No Iterations 1
smoothSolver:  Solving for k, Initial residual = 1, Final residual = 0.0534371, No Iterations 2
ExecutionTime = 9.27 s  ClockTime = 10 s
"""


pattern = re.compile(r'^.*Solving for (\w+), Initial residual = ([0-9.\-+eE]+), Final residual = ([0-9.\-+eE]+)')

initial_residuals = {}
final_residuals = {}

for line in log.split('\n'):
  match = pattern.match(line)
  if match is not None:
    key = match.group(1)
    initial_residuals[key] = float(match.group(2))
    final_residuals[key] = float(match.group(3))

print('Initial', initial_residuals)
print('Final', final_residuals) 

它将印刷字典：

首字母{'Ux'：1.0，'Uy'：1.0，'Uz'：1.0，'p'：1.0，'epsilon'：0.239416，'k'：1.0}

最后{'Ux'：0.0289664，'Uy'：0.028966，'Uz'：0.0842607，'p'：0.0471791，'epsilon'：0.0154473，'k'：0.0534371}