我正在尝试进行pandas合并,但在尝试运行时出现了标题中的错误。我使用3列进行匹配,而之前只使用2列进行类似的合并,它可以正常工作。
df = pd.merge(df, c, how="left",
left_on=["section_term_ps_id", "section_school_id", "state"],
right_on=["term_ps_id", "term_school_id", "state"])
两个数据框的列
df:
Index([u'section_ps_id', u'section_school_id', u'section_course_number', u'secti
on_term_ps_id', u'section_staff_ps_id', u'section_number', u'section_expression'
, u'section_grade_level', u'state', u'sections_id', u'course_ps_id', u'course_sc
hool_id', u'course_number', u'course_schd_dept', u'courses_id', u'school_ps_id',
u'course_school_id', u'school_name', u'school_abbr', u'school_low_grade', u'sch
ool_high_grade', u'school_alt_school_number', u'school_state', u'school_phone',
u'school_fax', u'school_principal', u'school_principal_phone', u'school_principa
l_email', u'school_asst_principal', u'school_asst_principal_phone', u'school_ass
t_principal_email'], dtype='object')
c:
Index([u'term_ps_id', u'term_school_id', u'term_portion',
u'term_start_date', u' term_end_date', u'term_abbreviation',
u'term_name', u'state', u'terms_id', u'sch ool_ps_id',
u'term_school_id', u'school_name', u'school_abbr', u'school_low_grad
e', u'school_high_grade', u'school_alt_school_number',
u'school_state', u'school
_phone', u'school_fax', u'school_principal', u'school_principal_phone', u'school
_principal_email', u'school_asst_principal', u'school_asst_principal_phone', u's chool_asst_principal_email'],
dtype='object')
可以像这样在三列上合并吗?在合并调用中有什么问题吗?
这样合并三列是可行的吗?在这里进行合并调用是否存在任何问题?
c
数据框中似乎有两列名字一样的"term_school_id"
列... 要么删掉其中一列,要么重命名以避免重复。 - Primer