Python：如何实现获取最新位置

目标：- 我需要用下面的输入解析一个文件，并在状态为approved且builddate为latest时获取最新（builddate时间戳应为latest）位置。我提供了示例输入和输出，我有perl中的代码，这是python的新代码，请建议如何在python中实现

INPUT:-
Build:          M1234BAAAANAAW9321.1
Location:       \\dreyers\builds468\INTEGRATION\M1234BAAAANAA9321.1
Comments:       Build completed, labeled, and marked for retention.
Status:         Approved
BuildDate:      10/25/2012 12:51:25


Build:          M1234BAAAANAAW9321.2
Location:       \\crmbld01\Builds\FAILED\M1234BAAAANAA9321.2
Comments:       The build is currently in a failed status.
Status:         Failed
BuildDate:      10/25/2012 19:37:17


Build:          M1234BAAAANAAW9321.3
Location:       \\freeze\builds427\INTEGRATION\M1234BAAAANAA9321.3
Comments:       Build completed, labeled, and marked for retention.
Status:         Approved
BuildDate:      10/25/2012 19:43:28

OUTPUT:-\\freeze\builds427\INTEGRATION\M1234BAAAANAA9321.3

下面是实现的perl代码，我是python新手，请建议如何对该代码进行python化

$ echo 'Build:          M1234BAAAANAAW9321.1
Location:       \\dreyers\builds468\INTEGRATION\M1234BAAAANAAW9321.1
Comments:       Build completed, labeled, and marked for retention.
Status:         Approved
BuildDate:      10/25/2012 12:51:25


Build:          M1234BAAAANAAW9321.2
Location:       \\crmbld01\Builds\FAILED\M1234BAAAANAAW9321.2
Comments:       The build is currently in a failed status.
Status:         Failed
BuildDate:      10/25/2012 19:37:17


Build:          M1234BAAAANAAW9321.3
Location:       \\freeze\builds427\INTEGRATION\M1234BAAAANAAW9321.3
Comments:       Build completed, labeled, and marked for retention.
Status:         Approved
BuildDate:      10/25/2012 19:43:28
' | perl -e'

local $/ = "";
my ( $build_date, $location );
while ( <> ) {
next unless /status:\s+approved/i;
my $date = sprintf "%04d%02d%02d%02d%02d%02d", ( /builddate:\s+(\d
++)\D+(\d+)\D+(\d+)\D+(\d+)\D+(\d+)\D+(\d+)/i )[ 2, 0, 1, 3, 4, 5 ];
if ( !defined $build_date || $build_date lt $date ) {
    ( $build_date, $location ) = ( $date, /location:\s+(.+)/i );
    }                                                           
}    

---

您可以将问题分为一系列更简单的步骤：

逐行读取输入

收集“名称：值”对

将对分组到记录中（每条记录以“构建”对开头）

选择具有非空“BuildDate”、“Location”值的“Approved”记录

使用给定的日期/时间格式查找最新记录

实施：

#!/usr/bin/env python
import sys
from datetime  import datetime
from itertools import groupby

# find all 'name: value' pairs
file = sys.stdin
pairs = ([s.strip() for s in line.partition(':')[::2]]
         for line in file if ':' in line)

# group records
def record_start(pair, count=[False]):
    """Mark start of a record."""
    if pair[0] == 'Build':
        count[0] = not count[0]
    return count[0]
records = (dict(record) for _, record in groupby(pairs, record_start))

approved = (r for r in records if r.get('Status') == 'Approved' and
            all(r.get(name) for name in "BuildDate Location".split()))

# find latest record
def get_date(record):
    try:
        return datetime.strptime(record['BuildDate'], '%m/%d/%Y %H:%M:%S')
    except ValueError:
        return datetime.min # handle invalid date strings

latest = max(approved, key=get_date)
assert get_date(latest) != datetime.min
print(latest['Location'])

请尝试以下代码：

lastLocation = None
lastTime = None
skip = False

bestLocation = None
bestTime = None

for line in text.split('\n'):    
    line.find('Location')
    if line.find('Location') == 0:
        # Build Location
        skip = False
        print "  Found Build location"
        lastLocation = line.split(":")[1].lstrip()       
    elif line.find('Status') == 0:
        # Status
        print "  Found Status"
        status = line.split(":")
        status1 = status[1].strip()
        if status1 != "Approved":
            skip = True
    elif line.find('BuildDate') == 0 and not skip:
        # Main Make
        print "  Found BuildDate"
        timeStr = line.split(":", 1)[1].lstrip()
        lastTime = datetime.datetime.strptime(timeStr, "%m/%d/%Y %H:%M:%S")
        if bestTime == None or bestTime < lastTime:
            bestTime = lastTime
            bestLocation = lastLocation
print lastLocation

lastLocation=None
lastTime=无
跳过=错误
最佳位置=无
最佳时间=无
对于text.split（'\n'）中的行：
line.find（'位置'）
如果line.find（'Location'）==0：
#构建位置
跳过=错误
打印“找到的生成位置”
lastLocation=line.split（“：”[1]。lstrip（）
elif line.find（'Status'）==0:
#地位
打印“找到状态”
状态=行。拆分（“：”）
status1=状态[1]。条带（）
如果状态为1！=“批准”：
跳过=真
elif line.find（'BuildDate'）==0且不跳过：
#主要品牌
打印“找到构建日期”
timeStr=line.split（“：”，1）[1].lstrip（）
lastTime=datetime.datetime.StrTime（timeStr，“%m/%d/%Y%H:%m:%S”）
如果bestTime==无或bestTime

由于出现以下错误，我怀疑格式是否正确。。lastTime=datetime.datetime.strptime（timeStr，“%m/%d/%Y%H:%m:%S”）文件“C:\python2.7.3\lib_strptime.py”，第328行，在_strpTimedata_string[found.end（）：]）值错误：未转换的数据仍然存在：@user1795998如果您觉得我的答案有用，请投票支持我的答案并将其标记为接受。

\\freeze\builds427\INTEGRATION\M1234BAAAANAA9321.3

lastLocation = None
lastTime = None
skip = False

bestLocation = None
bestTime = None

for line in text.split('\n'):    
    line.find('Location')
    if line.find('Location') == 0:
        # Build Location
        skip = False
        print "  Found Build location"
        lastLocation = line.split(":")[1].lstrip()       
    elif line.find('Status') == 0:
        # Status
        print "  Found Status"
        status = line.split(":")
        status1 = status[1].strip()
        if status1 != "Approved":
            skip = True
    elif line.find('BuildDate') == 0 and not skip:
        # Main Make
        print "  Found BuildDate"
        timeStr = line.split(":", 1)[1].lstrip()
        lastTime = datetime.datetime.strptime(timeStr, "%m/%d/%Y %H:%M:%S")
        if bestTime == None or bestTime < lastTime:
            bestTime = lastTime
            bestLocation = lastLocation
print lastLocation