注意:我是Python新手。
我的任务是设计一个输出外国车牌的程序,但是如果他们超速的话,只能是。在此过程中,我可能犯了一些错误,但我需要帮助处理列表Timestaken2和字典Timestaken3。#UK和#F只是我的笔记,让我能够快速地看一看,哪个是,UK,,,以及一个F。
import re
distance=750 #variable for the distance between the Camera A and B (in m)
speedlimit=70 # (mps)
NumberPlates=["DV61 GGB",#UK
"DS11 EUBG 20",#F
"5T314 10A02",#F
"24TEG 5063",#F
"TR09 TRE",#UK
"524 WAL 75",#F
"TR44 VCZ",#UK
"FR52 SWD",#UK
"100 GBS 12",#F
"HG55 BPO"#UK
]
Enter=[7.12,7.15,7.24,7.45,7.28,7.31,7.18,7.25,7.33,7.38] #A list for the times of cars passing Camera A
Leave=[7.56,7.24,7.48,7.52,7.45,7.57,7.22,7.31,7.37,7.47] #A list for the times of cars passing Camera B
Timestaken=[]
Timestaken2=[]
Timestaken3={}
for enter_data, leave_data in zip(Enter, Leave):
Timestaken.append(leave_data-enter_data)
Timestaken=["%.2f" % (leave_data-enter_data) for enter_data, leave_data in zip(Enter, Leave)]
Timestaken2=[s.strip("0") for s in Timestaken]
Timestaken2=[s.strip('.') for s in Timestaken2]
for key,value in zip(NumberPlates,Timestaken2):
Timestaken3[key]=value
print(Timestaken3)
for item in NumberPlates:
UK_Numbers=list(filter(lambda x: re.match("[A-Z]{2}\d{2}\s+[A-Z]{3}$",x),NumberPlates))
for item in UK_Numbers:
if item in UK_Numbers:
NumberPlates.remove(item)
print(NumberPlates)
for key,value in zip(NumberPlates,Timestaken2):
Timestaken3[key]=value
print(Timestaken3)
print("10 cars have passed Camera A, then Camera B\n")
for key,value in Timestaken3.items():
speed=distance/int(value)
if speed>speedlimit:
print(key,"is speeding with",speed,"mps")我在程序中包括了print(),以查看程序最后做了什么。
for key,value in zip(NumberPlates,Timestaken2):
Timestaken3[key]=value我只期望剩下的NumberPlates,即外国的,将在这段代码之后被打印出来。Timestaken2是否存在问题,因为它仍然有10个值?
请帮助我任何您可能有的解决方案。
发布于 2015-11-13 16:34:49
不太确定,但也许你只是想做一本新字典:
Timestaken4={}
for key,value in zip(NumberPlates,Timestaken2):
Timestaken4[key]=value
print(Timestaken4)发布于 2015-11-13 16:39:49
问题是,在代码的第二部分中,您正在重用TimesTaken3。如果您创建了一个用于加速外国汽车的新字典TimestakenForeign,那么您的代码似乎会像预期的那样工作:
print(NumberPlates)
TimestakenForeign = {}
for key,value in zip(NumberPlates,Timestaken2):
TimestakenForeign[key]=value
print(TimestakenForeign)
print("10 cars have passed Camera A, then Camera B\n")
for key,value in TimestakenForeign.items():
speed=distance/int(value)
if speed>speedlimit:
print(key,"is speeding with",speed,"mps")https://stackoverflow.com/questions/33697422
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