python - 没有明显原因的语法错误 : non-keyword arg after keyword arg,

Question

我有一个 .dat 文件，我首先想将其转换为 .csv 文件，然后根据时间绘制一些行，我的脚本如下:

import pandas as pd
import numpy as np
from sys import argv
from pylab import *


import csv



script, filename = argv

txt = open(filename)

print "Here's your file %r:" % filename
print txt.read()

# read flash.dat to a list of lists
datContent = [i.strip().split() for i in open("./flash.dat").readlines()]

# write it as a new CSV file
with open("./flash.csv", "wb") as f:
    writer = csv.writer(f)
    writer.writerows(datContent)



def your_func(row):
    return (row['global_beta'])


columns_to_keep = ['#time', 'global_beta', 'max_dens', 'max_temp', 'dens@max_temp']
dataframe = pd.read_csv("./flash.csv", usecols=columns_to_keep)



dataframe['Nuclear_Burning'] = dataframe.apply(your_func, axis=1)



pd.set_option('display.height', 1000)
pd.set_option('display.max_rows', 1000)
pd.set_option('display.max_columns', 500)
pd.set_option('display.width', 1000)

dataframe.plot(x='#time', 'Nuclear_Burning', style='r')

print dataframe

show()

我用 python csv_flash_dat_file.py flash.dat 执行脚本并得到以下错误:

File "csv_flash_dat_file.py", line 46
    dataframe.plot(x='#time', 'Nuclear_Burning', style='r')
SyntaxError: non-keyword arg after keyword arg

我没有看到找到错误的明显原因，请帮我解决这个问题。

Answer 1

参数“Nuclear_Burning”跟在关键字参数 x 之后。一旦开始在参数列表中使用关键字，就必须继续使用关键字参数。