len(x) показывает длину
str(x) показывает весь словарь как строку
ux=x["ux_golova"] #выдает KeyError
len(x)=200 str(x)={'uy_r_ruka_4': ‘1.0’, ‘ux_r_predplecho’: ‘1.0’, ‘uy_camera’: ‘1.0’, ‘r_predplecho’: 544.0, ‘ux_taz’: ‘1.0’, ‘wirina_viski’: ‘1.0’, ‘sdvig_cheljust’: ‘1.0’, ‘sgib_l_ruka_4’: ‘1.0’, ‘uy_l_ruka_2’: ‘1.0’, ‘sgib_l_noga_2’: ‘1.0’, ‘sgib_r_noga_3’: ‘1.0’, ‘uy_golova’: ‘1.0’, ‘uz_golova’: ‘1.0’, ‘ux_r_noga_1’: ‘1.0’, ‘uz_r_stopa’: ‘1.0’, ‘uy_l_golen’: ‘1.0’, ‘zubbl_rot’: ‘1.0’, ‘uz_l_ruka_1’: ‘1.0’, ‘vblsota_viski’: ‘1.0’, ‘uy_l_noga_1’: ‘1.0’, ‘uy_r_predplecho’: ‘1.0’, ‘uz_l_ruka_5’: ‘1.0’, ‘uz_r_noga_3’: ‘1.0’, ‘sgib_r_noga_2’: ‘1.0’, ‘vniz_skulbl’: ‘1.0’, ‘uy_weja’: ‘1.0’, ‘uy_r_kljuchica’: ‘1.0’, ‘ux_r_ruka_3’: ‘1.0’, ‘ux_r_ruka_2’: ‘1.0’, ‘sgib_l_ruka_1’: ‘1.0’, ‘glaza’: 68.0, ‘ux_spina’: ‘1.0’, ‘vniz_rot’: ‘1.0’, ‘ux_r_noga_4’: ‘1.0’, ‘d_otv_uwi’: ‘1.0’, ‘sgib_r_ruka_4’: ‘1.0’, ‘weja’: 272.0, ‘uy_spina_verx’: ‘1.0’, ‘ux_l_kist’: ‘1.0’, ‘l_stopa’: 204.0, ‘sgib_l_ruka_5’: ‘1.0’, ‘l_plecho’: 544.0, ‘uz_r_kljuchica’: ‘1.0’, ‘uy_weja_verx’: ‘1.0’, ‘uy_l_stopa’: ‘1.0’, ‘wirina_cheljust’: ‘1.0’, ‘vverx_makuwka’: ‘1.0’, ‘uz_l_noga_1’: ‘1.0’, ‘ux_r_noga_3’: ‘1.0’, ‘ux_l_noga_3’: ‘1.0’, ‘r_kist’: 136.0, ‘uz_r_ruka_5’: ‘1.0’, ‘uy_l_bedro’: ‘1.0’, ‘ux_l_golen’: ‘1.0’, ‘doy_perespektiva’: ‘1.0’, ‘uz_l_golen’: ‘1.0’, ‘sgib_l_noga_3’: ‘1.0’, ‘ux_l_ruka_5’: ‘1.0’, ‘uz_camera’: ‘1.0’, ‘ux_l_noga_5’: ‘1.0’, ‘uz_l_noga_3’: ‘1.0’, ‘l_kljuchica’: 204.0, ‘uy_spina’: ‘1.0’, ‘uz_l_plecho’: ‘1.0’, ‘uz_r_ruka_3’: ‘1.0’, ‘ux_l_ruka_3’: ‘1.0’, ‘uz_l_kljuchica’: ‘1.0’, ‘uz_l_noga_5’: ‘1.0’, ‘uz_r_noga_1’: ‘1.0’, ‘ux_l_ruka_2’: ‘1.0’, ‘sgib_r_ruka_3’: ‘1.0’, ‘ux_r_ruka_1’: ‘1.0’, ‘ux_r_ruka_5’: ‘1.0’, ‘uy_taz’: ‘1.0’, ‘vblsota_makuwka’: ‘1.0’, ‘sgib_l_noga_5’: ‘1.0’, ‘vpered_cheljust’: ‘1.0’, ‘ux_weja’: ‘1.0’, ‘ux_r_kljuchica’: ‘1.0’, ‘ux_weja_niz’: ‘1.0’, ‘vverx_lob’: ‘1.0’, ‘uy_l_plecho’: ‘1.0’, ‘uz_r_noga_5’: ‘1.0’, ‘sgib_l_ruka_3’: ‘1.0’, ‘l_golen’: 680.0, ‘uz_spina_verx’: ‘1.0’, ‘uz_l_ruka_4’: ‘1.0’, ‘r_golen’: 680.0, ‘wirina_lob’: ‘1.0’, ‘uy_r_noga_2’: ‘1.0’, ‘uy_r_ruka_5’: ‘1.0’, ‘wirina_rot’: ‘1.0’, ‘uz_l_ruka_3’: ‘1.0’, ‘uz_taz’: ‘1.0’, ‘uy_l_kljuchica’: ‘1.0’, ‘ux_r_noga_2’: ‘1.0’, ‘r_bedro’: 680.0, ‘ux_l_noga_2’: ‘1.0’, ‘ux_l_stopa’: ‘1.0’, ‘ux_l_kljuchica’: ‘1.0’, ‘sgib_r_noga_4’: ‘1.0’, ‘otkrblt_rot_cheljust’: ‘1.0’, ‘sgib_r_ruka_2’: ‘1.0’, ‘uy_l_noga_3’: ‘1.0’, ‘uy_weja_niz’: ‘1.0’, ‘ux_r_kist’: ‘1.0’, ‘sgib_r_noga_5’: ‘1.0’, ‘uy_r_noga_4’: ‘1.0’, ‘uy_r_bedro’: ‘1.0’, ‘uz_r_noga_4’: ‘1.0’, ‘uz_weja_niz’: ‘1.0’, ‘ux_l_noga_1’: ‘1.0’, ‘uz_l_noga_2’: ‘1.0’, ‘sgib_r_ruka_1’: ‘1.0’, ‘uz_r_bedro’: ‘1.0’, ‘uz_r_kist’: ‘1.0’, ‘nazad_skulbl’: ‘1.0’, ‘uz_r_ruka_4’: ‘1.0’, ‘nazad_uwi’: ‘1.0’, ‘wirina_nos’: ‘1.0’, ‘l_bedro’: 680.0, ‘ux_r_noga_5’: ‘1.0’, ‘uz_l_noga_4’: ‘1.0’, ‘ux_golova’: ‘1.0’, ‘vblsota_lob’: ‘1.0’, ‘ux_l_predplecho’: ‘1.0’, ‘wirina_skulbl’: ‘1.0’, ‘uz_r_predplecho’: ‘1.0’, ‘sgib_l_noga_1’: ‘1.0’, ‘vblsota_nos’: ‘1.0’, ‘sgib_l_ruka_2’: ‘1.0’, ‘ux_spina_niz’: ‘1.0’, ‘vverx_viski’: ‘1.0’, ‘r_plecho’: 544.0, ‘uz_r_ruka_1’: ‘1.0’, ‘jamochka_cheljust’: ‘1.0’, ‘ux_r_stopa’: ‘1.0’, ‘uz_l_ruka_2’: ‘1.0’, ‘ux_r_bedro’: ‘1.0’, ‘dox_perespektiva’: ‘1.0’, ‘r_kljuchica’: 204.0, ‘uz_l_predplecho’: ‘1.0’, ‘uy_r_noga_5’: ‘1.0’, ‘vverx_zatbllok’: ‘1.0’, ‘uy_l_noga_5’: ‘1.0’, ‘uy_r_plecho’: ‘1.0’, ‘dlina_zatbllok’: ‘1.0’, ‘uz_r_golen’: ‘1.0’, ‘uz_weja_verx’: ‘1.0’, ‘uy_l_predplecho’: ‘1.0’, ‘sgib_l_noga_4’: ‘1.0’, ‘uy_spina_niz’: ‘1.0’, ‘uy_r_ruka_1’: ‘1.0’, ‘uz_spina’: ‘1.0’, ‘l_predplecho’: 544.0, ‘uy_r_noga_3’: ‘1.0’, ‘uy_r_ruka_2’: ‘1.0’, ‘ux_l_ruka_4’: ‘1.0’, ‘nazad_zatbllok’: ‘1.0’, ‘vniz_nos’: ‘1.0’, ‘uy_r_golen’: ‘1.0’, ‘uz_l_kist’: ‘1.0’, ‘vniz_cheljust’: ‘1.0’, ‘r_stopa’: 204.0, ‘uz_r_ruka_2’: ‘1.0’, ‘ux_l_plecho’: ‘1.0’, ‘uy_l_ruka_1’: ‘1.0’, ‘uz_spina_niz’: ‘1.0’, ‘sgib_r_ruka_5’: ‘1.0’, ‘uz_l_bedro’: ‘1.0’, ‘uy_r_kist’: ‘1.0’, ‘uy_r_noga_1’: ‘1.0’, ‘ux_l_ruka_1’: ‘1.0’, ‘uy_r_stopa’: ‘1.0’, ‘uz_weja’: ‘1.0’, ‘uy_r_ruka_3’: ‘1.0’, ‘ux_l_bedro’: ‘1.0’, ‘ux_r_plecho’: ‘1.0’, ‘uz_r_plecho’: ‘1.0’, ‘sgib_r_noga_1’: ‘1.0’, ‘uy_l_noga_4’: ‘1.0’, ‘uy_l_ruka_3’: ‘1.0’, ‘uz_l_stopa’: ‘1.0’, ‘wirina_makuwka’: ‘1.0’, ‘vverx_uwi’: ‘1.0’, ‘l_kist’: 136.0, ‘uz_r_noga_2’: ‘1.0’, ‘spina’: 680.0, ‘uy_l_ruka_5’: ‘1.0’, ‘uy_l_noga_2’: ‘1.0’, ‘ux_l_noga_4’: ‘1.0’, ‘uy_l_kist’: ‘1.0’, ‘taz’: 136.0, ‘ux_weja_verx’: ‘1.0’, ‘uy_l_ruka_4’: ‘1.0’, ‘ux_r_golen’: ‘1.0’, ‘ux_spina_verx’: ‘1.0’, ‘doz_perespektiva’: ‘1.0’, ‘ux_r_ruka_4’: ‘1.0’, ‘ux_camera’: ‘1.0’}