陷在python解析中的一個簡單的for循環中,其中一些記錄工作的JSON(返回打印值),而大多數則不。我已經確認JSON記錄確實在'description'節點中有數據。我認爲價值觀被覆蓋了。在Python之後失去JSON循環的值
這裏是循環:
features = json_record['features']
title_list = []
description_list = []
for i in features:
title = i['title']
title_list.append(title)
description = i['description']
description_list.append(description)
print description_list # this ALWAYS works, and returns the list
print description_list # this only SOMETIMES work, else returns nothing
樣品JSON:
"features":[{"sequence":"0","title":"colors","description":"lighting scenes.","valueOf":"<b>Choose from<\/b><br>favorite lighting scenes."},{"sequence":"1","title":"at your fingertips","description":"light output.","valueOf":"<b>features at your fingertips<\/b><br>light output."}
您可以共享一個輸入/輸出對來說明問題嗎? – Sebastian
@Sebastian補充json – jKraut
所以,這段代碼被多次調用,有時它會打印......什麼?字面上沒有或者可能'']'?如果'「features」列表爲空,你會得到一個空列表。爲了調試,在'for'循環之前添加'assert features',需要功能''來查看你的假設是否正確。 – tdelaney