我在运行timeit.Timer
时遇到SyntaxError: EOL while scanning string literal
错误。我的设置是一个跨越多行的长字符串:
setup = """
import datetime
import glob
import os
import pandas as pd
ydate = str(20180308)
# Import
path = 'path_to_file'
all_files = glob.glob(os.path.join(path, '*.csv'))
all_files = [x for x in all_files if ydate in x]
all_files = [x.replace('\','/') for x in all_files]"""
我已经移动了引号,尝试在'
和"
位置之间交换,我能想到的任何通常可以修复此错误的东西,但在运行时它仍然会引发错误
t = timeit.Timer("[pd.read_csv(x,encoding='latin-1') for x in all_files]", setup=setup)
t.timeit()
也对不同的计时方式持开放态度。我基本上是在比较map
与列表理解解决方案的时间。
SyntaxError 发生在安装程序的最后一行。一种解决方案是在最后一行添加一对反斜杠:
setup = """
import datetime
import glob
import os
import pandas as pd
ydate = str(20180308)
# Import
path = 'path_to_file'
all_files = glob.glob(os.path.join(path, '*.csv'))
all_files = [x for x in all_files if ydate in x]
all_files = [x.replace('\\', '/') for x in all_files]"""
但是,glob
应返回操作系统的有效路径。因此,如果将反斜杠替换为正斜杠,您的操作系统可能无法再找到这些文件。在这种情况下,我建议跳过设置的最后一行:
setup = """
import datetime
import glob
import os
import pandas as pd
ydate = str(20180308)
# Import
path = 'path_to_file'
all_files = glob.glob(os.path.join(path, '*.csv'))
all_files = [x for x in all_files if ydate in x]"""