Python檔案之----JSON

標籤：

#coding=utf-8import jsondef writeJSON(filaName="test.json"):   f=open(filaName, "wb")   testDic={"key":"value"}   json.dump(testDic,f)   f.close()def readJSON(fileName="test.json"):   f=file(fileName,"r")   s=json.load(f)   f.close()   print s.keys()   print s["key"]def main():    writeJSON()    readJSON()if __name__=="__main__":    main()‘‘‘輸出：[u‘key‘]value[Finished in 0.1s]‘‘‘

此外對於複雜的json檔案，可結合普通文本的寫操作，例如寫D3用的GeoJson檔案：

def writeJSON(filaName="Japan.json"):  f=open(filaName, "w")  f.write("{\n")  f.write("   \"type\": \"FeatureCollection\",\n")  f.write("   \"features\": [\n")    for i in range(0,len(numOne)):    dicProperties={}    listcoodinates=[]    dicfeature={}    dicfeature[‘type‘]="Feature"    dicgeometry={"type": "Polygon"}    temp=[]    temp.append(numOne[i])    dicgeometry[‘coordinates‘]=temp    dicfeature[‘geometry‘]=dicgeometry    f.write("   ")    json.dump(dicfeature, f)    if (i== len(numOne)-1):      f.write("\n")    else:      f.write(",\n")  f.write("  ]\n")  f.write("}")  f.close()

Japan.json檔案：

Python檔案之----JSON