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python - 从python中的JSON文件中提取一个对象

问题描述

我的 JSON 文件（总共 5000 个）看起来像这样

{"version":1.2,"people":[{"pose_keypoints_2d":[0,0,0,1383.9,318.242,0.892951,1427.93,327.25,0.828307,1445.77,409.619,0.952105,1416.18,397.863,0.090918,1345.49,306.583,0.789117,0,0,0,0,0,0,1377.87,459.777,0.824136,1404.51,471.452,0.745714,0,0,0,0,0,0,1345.6,459.6,0.731992,0,0,0,0,0,0,0,0,0,0,0,0,1421.95,271.437,0.540316,1377.91,268.169,0.306764,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[1516.22,174.003,0.932503,1507.48,224.333,0.864362,1451.52,221.257,0.883005,1413.29,291.958,0.80518,1463.28,291.779,0.867427,1563.37,238.898,0.84872,1569.37,321.275,0.825046,1566.2,394.961,0.864594,1495.57,412.46,0.804823,1466.11,409.65,0.698038,1454.5,527.379,0.146485,0,0,0,1528.09,412.567,0.733411,1516.28,530.372,0.196314,0,0,0,1504.51,156.44,0.878404,1525.11,159.409,0.852905,1492.74,159.449,0.567964,1542.82,171.264,0.637156,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[630.433,247.712,0.887763,621.52,297.744,0.898341,580.278,297.779,0.803383,600.839,380.229,0.766635,624.594,324.31,0.850614,665.583,294.92,0.862791,677.475,377.217,0.792423,644.959,389.091,0.861932,630.352,459.596,0.708987,606.759,459.742,0.639099,612.697,580.392,0.424434,594.964,809.933,0.445884,659.764,456.741,0.742195,653.902,577.364,0.655682,648.036,689.252,0.638049,621.585,241.786,0.917391,642.178,238.881,0.869318,597.994,244.66,0.8782,648.082,238.926,0.0987843,674.549,715.811,0.559119,677.444,712.729,0.545488,642.173,695.197,0.447904,648.119,833.326,0.4606,639.217,836.383,0.40265,583.314,830.54,0.387601],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[0,0,0,1024.74,274.253,0.879164,1071.92,280.108,0.773811,1092.51,365.365,0.638758,0,0,0,977.61,271.255,0.881595,974.632,342.017,0.124485,0,0,0,1018.81,439.052,0.685377,1048.31,441.989,0.674454,1039.42,553.779,0.665407,1018.85,662.676,0.66249,980.631,436.208,0.673822,983.535,547.897,0.543447,974.669,647.981,0.465162,0,0,0,0,0,0,1068.95,224.063,0.535875,1021.84,215.334,0.331974,989.444,665.68,0.120769,962.987,650.998,0.121694,971.792,665.614,0.374614,1036.49,668.732,0.40357,1036.47,671.618,0.45803,1007.05,671.574,0.609372],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[1133.66,156.449,0.871671,1160.14,200.52,0.909641,1119.08,194.716,0.881631,1101.34,250.727,0.741804,1095.47,306.6,0.554203,1189.7,206.51,0.863547,1210.3,294.77,0.795075,1201.36,359.55,0.150867,1142.45,356.582,0.705377,1118.83,350.711,0.660271,1118.81,450.822,0.10509,0,0,0,1166.08,359.521,0.703378,1160.13,439.008,0.0764702,0,0,0,1124.82,150.485,0.869508,1142.39,150.587,0.958235,0,0,0,1166.1,150.462,0.915307,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[1327.76,344.854,0.7714,1230.79,412.576,0.777522,1186.54,430.265,0.710346,1166.08,574.291,0.745479,1286.74,551.003,0.859514,1274.9,400.802,0.615538,1333.89,500.898,0.732315,1330.99,406.568,0.842077,1251.33,692.147,0.54616,1213.11,695.104,0.558347,1195.5,874.656,0.59577,1151.27,1045.3,0.537499,1283.75,689.225,0.499876,1260.23,868.795,0.569042,1213.25,1018.88,0.64621,1310.24,338.859,0.914034,0,0,0,1260.32,342.03,0.923518,0,0,0,1283.71,1048.34,0.615529,1283.79,1045.27,0.588761,1201.34,1030.64,0.34822,1218.98,1054.23,0.162428,0,0,0,1139.5,1051.25,0.387906],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[851.14,230.059,0.836269,907,300.74,0.759377,886.42,294.972,0.670902,880.598,377.227,0.139703,839.35,365.599,0.321698,927.62,306.627,0.803614,921.722,409.668,0.740124,854.059,388.947,0.874953,886.524,486.13,0.63616,883.497,483.296,0.584742,903.968,624.47,0.744024,912.915,739.165,0.769062,895.273,489.101,0.678105,880.593,627.447,0.80521,880.369,789.348,0.833229,0,0,0,859.958,221.314,0.9495,0,0,0,901.129,227.162,0.8659,821.619,812.882,0.762655,839.321,818.779,0.748007,886.466,809.794,0.762739,865.847,745.129,0.178172,0,0,0,927.672,745.158,0.699705],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[1748.81,400.745,0.865472,1769.41,480.169,0.60199,1692.83,453.801,0.777207,1636.84,571.465,0.602594,1622.26,674.491,0.237392,1831.2,512.658,0.44287,1751.68,715.693,0.0641964,0,0,0,1689.96,718.654,0.295779,1645.81,703.916,0.317921,1607.49,854.024,0.214191,1572.18,1001.31,0.419405,1734.12,733.402,0.223622,1613.47,856.961,0.100664,1580.98,1010.01,0.141665,1745.88,377.234,0.802295,1772.39,397.828,0.831415,0,0,0,1819.34,433.244,0.858218,1489.73,1024.81,0.22791,1498.66,1036.55,0.219253,1589.85,1030.66,0.174787,1492.65,1024.84,0.494689,1492.73,1021.76,0.468759,1586.97,1024.84,0.321146],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[0,0,0,547.977,341.978,0.246313,536.227,341.878,0.601369,550.96,450.742,0.778364,615.651,424.273,0.762666,0,0,0,0,0,0,0,0,0,580.284,530.316,0.318203,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[1831.27,265.312,0.718134,1781.17,291.987,0.733738,1748.81,294.957,0.794407,1719.31,388.954,0.679386,1748.76,418.448,0.11695,1822.32,288.843,0.617834,0,0,0,0,0,0,1754.63,441.953,0.0559453,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1825.18,247.9,0.881403,1834.11,247.735,0.108933,1790.05,247.868,0.858578,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,577.393,527.334,0.376305,580.359,671.567,0.278565,618.596,692.074,0.379358,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,624.434,700.97,0.323246],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,580.365,533.218,0.257544,600.889,686.267,0.313003,600.939,809.808,0.41703,0,0,0,0,0,0,0,0,0,0,0,0,650.978,833.455,0.42398,648.014,827.561,0.372851,589.17,830.452,0.229458,0,0,0,0,0,0,0,0,0],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]},{"pose_keypoints_2d":[930.432,177.066,0.270157,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,927.496,174.034,0.370837,0,0,0,903.997,174.152,0.297842,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"face_keypoints_2d":[],"hand_left_keypoints_2d":[],"hand_right_keypoints_2d":[],"pose_keypoints_3d":[],"face_keypoints_3d":[],"hand_left_keypoints_3d":[],"hand_right_keypoints_3d":[]}],"part_candidates":[{"0":[1133.66,156.449,0.871671,1516.22,174.003,0.932503,930.432,177.066,0.270157,851.14,230.059,0.836269,630.433,247.712,0.887763,1831.27,265.312,0.718134,1327.76,344.854,0.7714,1748.81,400.745,0.865472],"1":[1160.14,200.52,0.909641,1507.48,224.333,0.864362,1024.74,274.253,0.879164,1781.17,291.987,0.733738,621.52,297.744,0.898341,907,300.74,0.759377,1383.9,318.242,0.892951,547.977,341.978,0.246313,1230.79,412.576,0.777522,1769.41,480.169,0.60199,1869.48,553.935,0.143333],"2":[1119.08,194.716,0.881631,1451.52,221.257,0.883005,1071.92,280.108,0.773811,886.42,294.972,0.670902,1748.81,294.957,0.794407,580.278,297.779,0.803383,1427.93,327.25,0.828307,536.227,341.878,0.601369,1186.54,430.265,0.710346,1692.83,453.801,0.777207,1922.51,533.203,0.0694578],"3":[1101.34,250.727,0.741804,1413.29,291.958,0.80518,1092.51,365.365,0.638758,880.598,377.227,0.139703,600.839,380.229,0.766635,1719.31,388.954,0.679386,1445.77,409.619,0.952105,550.96,450.742,0.778364,1636.84,571.465,0.602594,1166.08,574.291,0.745479],"4":[1463.28,291.779,0.867427,1095.47,306.6,0.554203,624.594,324.31,0.850614,839.35,365.599,0.321698,1416.18,397.863,0.090918,1748.76,418.448,0.11695,615.651,424.273,0.762666,1286.74,551.003,0.859514,1622.26,674.491,0.237392],"5":[1189.7,206.51,0.863547,1563.37,238.898,0.84872,977.61,271.255,0.881595,1822.32,288.843,0.617834,665.583,294.92,0.862791,927.62,306.627,0.803614,1345.49,306.583,0.789117,545.017,338.899,0.173114,1274.9,400.802,0.615538,1831.2,512.658,0.44287],"6":[1210.3,294.77,0.795075,1569.37,321.275,0.825046,974.632,342.017,0.124485,677.475,377.217,0.792423,921.722,409.668,0.740124,1333.89,500.898,0.732315,1751.68,715.693,0.0641964,1734.09,736.304,0.0629545,1704.59,974.704,0.0607181],"7":[1201.36,359.55,0.150867,644.959,389.091,0.861932,854.059,388.947,0.874953,1566.2,394.961,0.864594,1330.99,406.568,0.842077,1704.67,662.737,0.0836309],"8":[1142.45,356.582,0.705377,1495.57,412.46,0.804823,1018.81,439.052,0.685377,1754.63,441.953,0.0559453,630.352,459.596,0.708987,1377.87,459.777,0.824136,886.524,486.13,0.63616,580.284,530.316,0.318203,1251.33,692.147,0.54616,1689.96,718.654,0.295779,1863.57,992.377,0.0562326],"9":[1118.83,350.711,0.660271,1466.11,409.65,0.698038,1048.31,441.989,0.674454,606.759,459.742,0.639099,1404.51,471.452,0.745714,883.497,483.296,0.584742,577.393,527.334,0.376305,1213.11,695.104,0.558347,1645.81,703.916,0.317921],"10":[1118.81,450.822,0.10509,1454.5,527.379,0.146485,1039.42,553.779,0.665407,612.697,580.392,0.424434,903.968,624.47,0.744024,580.359,671.567,0.278565,1607.49,854.024,0.214191,1195.5,874.656,0.59577],"11":[1018.85,662.676,0.66249,618.596,692.074,0.379358,912.915,739.165,0.769062,594.964,809.933,0.445884,1572.18,1001.31,0.419405,1151.27,1045.3,0.537499],"12":[1166.08,359.521,0.703378,1528.09,412.567,0.733411,980.631,436.208,0.673822,659.764,456.741,0.742195,1345.6,459.6,0.731992,895.273,489.101,0.678105,580.365,533.218,0.257544,1283.75,689.225,0.499876,1734.12,733.402,0.223622,1795.89,980.592,0.0555809,1681.09,1074.83,0.0648456],"13":[1160.13,439.008,0.0764702,1516.28,530.372,0.196314,983.535,547.897,0.543447,653.902,577.364,0.655682,880.593,627.447,0.80521,600.889,686.267,0.313003,1613.47,856.961,0.100664,1260.23,868.795,0.569042],"14":[974.669,647.981,0.465162,648.036,689.252,0.638049,880.369,789.348,0.833229,600.939,809.808,0.41703,1580.98,1010.01,0.141665,1213.25,1018.88,0.64621,1663.41,1074.84,0.076733],"15":[1124.82,150.485,0.869508,1504.51,156.44,0.878404,927.496,174.034,0.370837,856.812,221.238,0.0621831,621.585,241.786,0.917391,1825.18,247.9,0.881403,1310.24,338.859,0.914034,1745.88,377.234,0.802295],"16":[1142.39,150.587,0.958235,1525.11,159.409,0.852905,930.546,174.006,0.13775,859.958,221.314,0.9495,642.178,238.881,0.869318,1834.11,247.735,0.108933,1330.78,330.13,0.111218,1772.39,397.828,0.831415],"17":[1492.74,159.449,0.567964,903.997,174.152,0.297842,1068.95,224.063,0.535875,597.994,244.66,0.8782,1790.05,247.868,0.858578,1421.95,271.437,0.540316,1260.32,342.03,0.923518],"18":[1166.1,150.462,0.915307,1542.82,171.264,0.637156,1021.84,215.334,0.331974,901.129,227.162,0.8659,648.082,238.926,0.0987843,1377.91,268.169,0.306764,1819.34,433.244,0.858218],"19":[989.444,665.68,0.120769,674.549,715.811,0.559119,821.619,812.882,0.762655,650.978,833.455,0.42398,1489.73,1024.81,0.22791,1283.71,1048.34,0.615529],"20":[962.987,650.998,0.121694,677.444,712.729,0.545488,839.321,818.779,0.748007,648.014,827.561,0.372851,1498.66,1036.55,0.219253,1283.79,1045.27,0.588761],"21":[971.792,665.614,0.374614,642.173,695.197,0.447904,886.466,809.794,0.762739,589.17,830.452,0.229458,1201.34,1030.64,0.34822,1589.85,1030.66,0.174787,1660.5,1074.84,0.0597874],"22":[1036.49,668.732,0.40357,668.602,715.634,0.124469,865.847,745.129,0.178172,648.119,833.326,0.4606,1492.65,1024.84,0.494689,1224.82,1051.34,0.162429,1218.98,1054.23,0.162428,1168.98,1074.84,0.174282,1198.4,1074.81,0.16778],"23":[1036.47,671.618,0.45803,650.994,715.785,0.112767,871.693,739.271,0.162696,639.217,836.383,0.40265,1492.73,1021.76,0.468759,1166.04,1074.81,0.239277],"24":[1007.05,671.574,0.609372,1424.99,695.172,0.0523207,624.434,700.97,0.323246,927.672,745.158,0.699705,583.314,830.54,0.387601,1586.97,1024.84,0.321146,1139.5,1051.25,0.387906]}]}

我只需要提取一个名为“1”的对象及其内容，并将它们保存到一个新的 JSON 文件中，并使用新名称，例如“新文件 1”、“新文件 2”...。

或者如果删除除“1”及其内容之外的所有内容，并将文件与对象“1”保持原样。

标签： pythonjson

解决方案

您可以使用该json库将文件内容读入 python 数据结构（在本例中为嵌套字典）。您可以dump将 JSON 数据的特定部分输出到新文件中。

import json

with open('input_json.json', 'r') as infile:
    data = json.load(infile)

for k, v in data['part_candidates'][0].items():
    with open('output_json_{}.json'.format(k), 'w') as outfile:
        json.dump(v, outfile)

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