python-2.7 - python と ElementTree が 1 行の長い出力を書き出す

Question

望ましい結果: 救急車の位置を示すスケーラブルなベクターグラフィックと、救急車が混雑しているか、運行していないか、待機中であるかなどを示す色を生成しようとしています。すべての救急車の配置を地図で確認できます。混雑している救急車と空いている救急車が一目でわかります。

私の方法論: 私は pyodbc と xml.etree で python 2.7 を使用しています。データベースにクエリを実行して最新の救急車のステータスを確認し、配列をループしてデータの svg を生成しています。

問題: 出力がテキストに書き出され、メモ帳を使用して .svg ファイルを開くと、1 行の長い出力が表示されます。ネストされた出力にしたいと思います。以下のコードを見ると、2 台の救急車のみをテストしていることがわかります。しかし、私のシステムには 50 台の救急車があります。何千文字もの長い行を 1 行に収めることはできません。

質問: python / ElementTree で出力に改行を書き出すにはどうすればよいですか?

以下に示すコード：

import pyodbc
from xml.etree import ElementTree as et

cnxn = pyodbc.connect('DRIVER={SQL Server}; SERVER=my server; DATABASE=my database; UID=my user id; PWD=my password')
cursor = cnxn.cursor()
AmbulanceStatus = """
WITH Maxtimes AS
(
SELECT
  MAX(M_Manpower_PK) AS [FirstRecord]
, PUN_UnitID
FROM MManpower
INNER JOIN PUnit ON M_kUnit = PUN_Unit_PK
WHERE PUN_UnitID LIKE 'M__'
OR PUN_UnitID LIKE 'FBA__'
AND M_tTime > DATEADD(HOUR, -24, GETDATE())
GROUP BY PUN_UnitID
)
,
MaxAttributes AS
(
SELECT
  M_Manpower_PK
, M_tTime
, M_Code
, CASE 
  WHEN M_Code IN ('USTA', 'USER', 'USOL', 'USAR', 'USIZ', 'UF', 'USTR', 'USDP') THEN 'Working'
  WHEN M_Code IN ('USAQ', 'USRQ') THEN 'Free'
  WHEN M_Code IN ('USES', 'USSB', 'USAS', 'USRS', 'USLC') THEN 'Standby'
  WHEN M_Code IN ('USOS') THEN 'OutofService'
  ELSE 'NA'
  END AS [Disposition]
FROM MManpower
INNER JOIN PUnit ON M_kUnit = PUN_Unit_PK
WHERE PUN_UnitID LIKE 'M__'
OR PUN_UnitID LIKE 'FBA__'
AND M_tTime > DATEADD(HOUR, -24, GETDATE())
)

SELECT
  MaxTimes.firstRecord AS [RecordNumber]
, MaxTimes.PUN_UnitID AS [Ambulance]
, CONVERT(VARCHAR(20), MaxAttributes.M_tTime, 108) AS [FinalTimeStamp]
, MaxAttributes.M_Code AS [UnitStatus]
, MaxAttributes.Disposition AS [Disposition]
FROM Maxtimes
LEFT OUTER JOIN MaxAttributes ON Maxtimes.FirstRecord=MaxAttributes.M_Manpower_PK
"""

cursor.execute(AmbulanceStatus)

Ambulances = cursor.fetchall()

cursor.close()

for ambulance in Ambulances:
    print ambulance

doc = et.Element('svg', width='792', height='612', version='1.1', xmlns='http://www.w3.org/2000/svg')
#===============================================================================
# I have no idea how to implement the following 15 lines of code. I downloaded them from the internet. I have googled this question and someone believes the following lines of code can help write out carriage returns.
#===============================================================================
# def indent(elem, level=0):
#    i = "\n" + level * "  "
#    if len(elem):
#        if not elem.text or not elem.text.strip():
#            elem.text = i + "  "
#        if not elem.tail or not elem.tail.strip():
#            elem.tail = i
#        for elem in elem:
#            indent(elem, level + 1)
#        if not elem.tail or not elem.tail.strip():
#            elem.tail = i
#    else:
#        if level and (not elem.tail or not elem.tail.strip()):
#            elem.tail = i
#===============================================================================
j = 0
#===============================================================================
# medic 19
#===============================================================================
while j < len(Ambulances):
    if Ambulances[j][1] == 'M19' and Ambulances[j][4] == 'Free':
        fillColor = 'aliceblue'
        fillText = 'black'
        et.SubElement(doc, 'circle', cx='520', cy='85', r='10', stroke='black', fill=fillColor)
        text = et.Element('text', x='520', y='85', fill=fillText, style='font-family:Sans;font-size:12px;text-anchor:middle;dominant-baseline:top')
        text.text = Ambulances[j][1]
        doc.append(text)

    elif Ambulances[j][1] == 'M19' and Ambulances[j][4] == 'Working':
        fillColor = 'red'
        fillText = 'white'
        et.SubElement(doc, 'circle', cx='520', cy='85', r='10', fill=fillColor)
        text = et.Element('text', x='520', y='85', fill=fillText, style='font-family:Sans;font-size:12px;text-anchor:middle;dominant-baseline:top')
        text.text = Ambulances[j][1]
        doc.append(text)

    elif Ambulances[j][1] == 'M19' and Ambulances[j][4] == 'Standby':
        fillColor = 'green'
        fillText = 'white'
        et.SubElement(doc, 'circle', cx='520', cy='85', r='10', fill=fillColor)
        text = et.Element('text', x='520', y='85', fill=fillText, style='font-family:Sans;font-size:12px;text-anchor:middle;dominant-baseline:top')
        text.text = Ambulances[j][1]
        doc.append(text)

    elif Ambulances[j][1] == 'M19' and Ambulances[j][4] == 'OutofService':
        fillColor = 'black'
        fillText = 'white'
        et.SubElement(doc, 'circle', cx='520', cy='85', r='10', fill=fillColor)
        text = et.Element('text', x='520', y='85', fill=fillText, style='font-family:Sans;font-size:12px;text-anchor:middle;dominant-baseline:top')
        text.text = Ambulances[j][1]
        doc.append(text)

    elif Ambulances[j][1] == 'M19' and Ambulances[j][4] == 'NA':
        fillColor = 'pink'
        fillText = 'blue'
        et.SubElement(doc, 'circle', cx='520', cy='85', r='10', fill=fillColor)
        text = et.Element('text', x='520', y='85', fill=fillText, style='font-family:Sans;font-size:12px;text-anchor:middle;dominant-baseline:top')
        text.text = Ambulances[j][1]
        doc.append(text)
#===============================================================================
# medic 16
#===============================================================================
    elif Ambulances[j][1] == 'M16' and Ambulances[j][4] == 'Free':
        fillColor = 'aliceblue'
        fillText = 'black'
        et.SubElement(doc, 'circle', cx='28.80024', cy='45.8372', r='10', stroke='black', fill=fillColor)
        text = et.Element('text', x='28.80024', y='45.8372', fill=fillText, style='font-family:Sans;font-size:12px;text-anchor:middle;dominant-baseline:top')
        text.text = Ambulances[j][1]
        doc.append(text)

    elif Ambulances[j][1] == 'M16' and Ambulances[j][4] == 'Working':
        fillColor = 'red'
        fillText = 'blue'
        et.SubElement(doc, 'circle', cx='28.80024', cy='45.8372', r='10', fill=fillColor)
        text = et.Element('text', x='28.80024', y='45.8372', fill=fillText, style='font-family:Sans;font-size:12px;text-anchor:middle;dominant-baseline:top')
        text.text = Ambulances[j][1]
        doc.append(text)

    elif Ambulances[j][1] == 'M16' and Ambulances[j][4] == 'Standby':
        fillColor = 'green'
        fillText = 'white'
        et.SubElement(doc, 'circle', cx='28.80024', cy='45.8372', r='10', fill=fillColor)
        text = et.Element('text', x='28.80024', y='45.8372', fill=fillText, style='font-family:Sans;font-size:12px;text-anchor:middle;dominant-baseline:top')
        text.text = Ambulances[j][1]
        doc.append(text)

    elif Ambulances[j][1] == 'M16' and Ambulances[j][4] == 'OutofService':
        fillColor = 'black'
        fillText = 'white'
        et.SubElement(doc, 'circle', cx='28.80024', cy='45.8372', r='10', fill=fillColor)
        text = et.Element('text', x='28.80024', y='45.8372', fill=fillText, style='font-family:Sans;font-size:12px;text-anchor:middle;dominant-baseline:top')
        text.text = Ambulances[j][1]
        doc.append(text)

    elif Ambulances[j][1] == 'M16' and Ambulances[j][4] == 'NA':
        fillColor = 'pink'
        fillText = 'blue'
        et.SubElement(doc, 'circle', cx='28.80024', cy='45.8372', r='10', fill=fillColor)
        text = et.Element('text', x='28.80024', y='45.8372', fill=fillText, style='font-family:Sans;font-size:12px;text-anchor:middle;dominant-baseline:top')
        text.text = Ambulances[j][1]
        doc.append(text)

#===============================================================================
# loop through the array
#===============================================================================
    j = j + 1

# ElementTree 1.2 doesn't write the SVG file header errata, so do that manually
f = open('C:\sample.svg', 'w')
f.write('<?xml version=\'1.0\' standalone=\'no\'?>\n')
f.write('<!DOCTYPE svg PUBLIC \'-//W3C//DTD SVG 1.1//EN\'\n')
f.write('\'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\'>\n')
f.write(et.tostring(doc))
f.close()

score 2 · Accepted Answer

このリンクをチェックしてください。

http://broadcast.oreilly.com/2010/03/pymotw-creating-xml-documents.html

from xml.dom import minidom

def prettify(elem):
    """Return a pretty-printed XML string for the Element.
    """
    rough_string = ET.tostring(elem, 'utf-8')
    reparsed = minidom.parseString(rough_string)
    return reparsed.toprettyxml(indent="  ")

python-2.7 - python と ElementTree が 1 行の長い出力を書き出す

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