DataFrame.stack([level, dropna]) #Pivot a level of the (possibly hierarchical) column labels, returning a DataFrame (or Series in the case of an object with a single level of column labels) having a hierarchical index with a new inner-most level of row labels. DataFrame.unstack([level, f...
returning a new object (a copy) with all the original columns in addition to the new ones.DataFrame.join(other[, on, how, lsuffix, …])Join columns with other DataFrame either on index or on a key column.DataFrame.merge(right[, how, on, left_on, ...
DataFrame.stack([level, dropna])Pivot a level of the (possibly hierarchical) column labels, returning a DataFrame (or Series in the case of an object with a single level of column labels) having a hierarchical index with a new inner-most level of row labels. DataFrame.unstack([level, fill...
add abs any tshift nunique count combine keys values set_axis isnull sparse first_valid_index combine_first ewm notnull empty mask truncate to_csv bool at clip radd to_markdown value_counts first isna between_time replace sample idxmin div iloc add_suffix pipe to_sql items max rsub flags...
Suffix to apply to overlapping column names in the left and right side, respectively. To raise an exception on overlapping columns use (False, False). copy : bool, default True If False, avoid copy if possible. indicator : bool or str, default False ...
df[columnname]:标示一个Series df[[columnname]]:标示一个DataFrame DataFrame可以用join函数进行拼接,而Series则不行 六。df拼接:join df.join(other, on=None, how='left', lsuffix='', rsuffix='', sort=False) 将df 和other按列合并, on:None代表是按照索引index进行匹配合并 columnsname:按照列进行...
to_pickle('test2.pickle')#将资料存取成pickle文件 3 #其他文件导入导出方式相同 /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/pandas/io/parsers.py in read_csv(filepath_or_buffer, sep, delimiter, header, names, index_col, usecols, squeeze, prefix, mangle_dupe_cols, ...
df.ta.ema(close=df.ta.ohlc4(append=True), length=10, suffix="OHLC4", append=True) Chaining Indicators require specifying the input like: close=df.ta.ohlc4(). df.ta.donchian(lower_length=10, upper_length=15, append=True) Appends to df with column names: DCL_10_15, DCM_10_15,...
suffixes : tuple of (str, str), default ('_x', '_y') Suffix to apply to overlapping column names in the left and right side, respectively. To raise an exception on overlapping columns use (False, False). copy : bool, default True If False, avoid copy if possible. indicator : bool...
pd.read_csv(filepath, sep=<no_default>,delimiter=None,header='infer',names=<no_default>,index_col=None,nrows=None,encoding=None,dtype=None,na_values=None) 2.生成csv文件 to_csv是数据框的函数,使用时需要先生成一个数据框实例dt,然后用数据框名.to_csv( )函数生成csv文件。注意路径需要包含csv后...