Python：如何将大数存储在 Pandas dataframe 作为 int64 或 float64？

Question

Similar to this question, Storing big numbers over 9000 digits in Python , I'm interested in storing large digits in a Pandas data frame where the dtype is int64 or float64 but not object. I have tried but I keep getting this error when I either initialize the dataframe or when I cast to int64 or float64 : OverflowError: int too large to convert to float .

Here is some sample code that raises an error:

data = [[4041067959774462618542251414053149763363284932506803841495981726909361589243016772093539952215008166854586458807896667612935940650616044271694578570770218354465319095565165551049760172710391683826002499005236096882016133967285292291606248423125012884140175919816849209382612886503119619750800600507246127268611380063066868139796774976684606993289391743637218529185641004454047725507720821393787669169611972814982330545723200072965546061194948505665350431588541107227045045135059495789131566496560507159916524037246652355679704655191235607257759392890459293292994869676442294348205840960197717998950931099935125824565443461965027936602550759188464075684122645652374411071687652948467619565381434911645676757024253483187841007912001722045733971195432548620690744725086837979031567344095323422174671522835282126126173748501439121944882602887928671532521816234961981946544118773557395130950306137831226533275921950157923776845085190156444450216692581322726107832236483226314003339464513548213142271415371910246088829012370639200542888385733241823213915919885883384151357374501359157931301139416090907994970949429195483607826525457136853740508614341446335314912887887891647364907817033609726890368372485038664354107037004105702300397408085198993506316238517085901918870189631204393632008524269869979074462426748217010716364884706958521730228474069227641283826703864839419845872269299777537, 10], [2, 15], [3, 14]]

  
df = pd.DataFrame(data, columns = ['code1', 'code2'])

---------------------------------------------------------------------------
OverflowError                             Traceback (most recent call last)
...
OverflowError: int too large to convert to float

It's clear you can cast the array to np.array but note that this forces the dtype to be object and not an int64 or float64 .

Answer 1

Use data in array format by using numpy.asarray() method. below is solution code for this question,

import numpy as np 
import pandas as pd 

data = [[4041067959774462618542251414053149763363284932506803841495981726909361589243016772093539952215008166854586458807896667612935940650616044271694578570770218354465319095565165551049760172710391683826002499005236096882016133967285292291606248423125012884140175919816849209382612886503119619750800600507246127268611380063066868139796774976684606993289391743637218529185641004454047725507720821393787669169611972814982330545723200072965546061194948505665350431588541107227045045135059495789131566496560507159916524037246652355679704655191235607257759392890459293292994869676442294348205840960197717998950931099935125824565443461965027936602550759188464075684122645652374411071687652948467619565381434911645676757024253483187841007912001722045733971195432548620690744725086837979031567344095323422174671522835282126126173748501439121944882602887928671532521816234961981946544118773557395130950306137831226533275921950157923776845085190156444450216692581322726107832236483226314003339464513548213142271415371910246088829012370639200542888385733241823213915919885883384151357374501359157931301139416090907994970949429195483607826525457136853740508614341446335314912887887891647364907817033609726890368372485038664354107037004105702300397408085198993506316238517085901918870189631204393632008524269869979074462426748217010716364884706958521730228474069227641283826703864839419845872269299777537, 10], [2, 15], [3, 14]]

data_array = np.asarray(data) 

df = pd.DataFrame(
    data_array, 
    columns=['code1', 'code2']
    )

print(df['code1'][0])