你似乎在艰难地做着很多事情。我会尽量在符合标准使用模式的同时简化它。
# Whatever imports you need
import pandas as pd
# Static variables and methods should generally be avoided.
# Change class and variable names to whatever is more suitable.
# Names should be meaningful when possible.
class MyData:
# Load data in constructor. Could easily do this in another method.
def __init__(self, filename):
self.data = pd.io.excel.read_excel(filename, sheetname='Sheet1')
def inputData():
# In my experience, forward slashes work just fine on Windows.
# Create new MyData object using constructor
x = MyData('C:/Users/Data/try.xlsx')
# Access member variable from object
print(x.data)
这里是加载方法而不是构造函数的版本。
import pandas as pd
class MyData:
# Constructor
def __init__(self):
# Whatever setup you need
self.data = None
self.loaded = False
# Method with optional argument
def loadFile(self, filename, sheetname='Sheet1')
self.data = pd.io.excel.read_excel(filename, sheetname=sheetname)
self.loaded = True
def inputData():
x = MyData()
x.loadFile('C:/Users/Data/try.xlsx')
print(x.data)
# load some other data, using sheetname 'Sheet2' instead of default
y = MyData()
y.loadFile('C:/Users/Data/tryagain.xlsx', 'Sheet2')
# can also pass arguments by name in any order like this:
# y.loadFile(sheetname='Sheet2', filename='C:/Users/Data/tryagain.xlsx')
print(y.data)
# x and y both still exist with different data.
# calling x.loadFile() again with a different path will overwrite its data.
之所以它不会在你原来的代码保存是因为分配值参数名称不会改变在Python的原始变量。你可以做的是这样的:
# Continuing from the last code block
def loadDefault(data):
data.loadFile('C:/Users/Data/try.xlsx')
def testReference():
x = MyData()
loadDefault(x)
# x.data now has been loaded
print(x.data)
# Another example
def setIndex0(variable, value):
variable[0] = value
def testSetIndex0():
v = ['hello', 'world']
setIndex0(v, 'Good morning')
# v[0] now equals 'Good morning'
print(v[0])
但你不能做到这一点:如果你希望能够到指定位置使用一个名称来存储值
def setString(variable, value):
# The only thing this changes is the value of variable inside this function.
variable = value
def testSetString():
v = 'Start'
setString(v, 'Finish')
# v is still 'Start'
print(v)
,你可以使用带索引/键的数据结构。字典允许您使用密钥访问和存储值。
import pandas as pd
class MyData:
# Constructor
def __init__(self):
# make data a dictionary
self.data = {}
# Method with optional argument
def loadFile(self, storename, filename, sheetname='Sheet1')
self.data[storename] = pd.io.excel.read_excel(filename, sheetname=sheetname)
# Access method
def getData(self, name):
return self.data[name]
def inputData():
x = MyData()
x.loadFile('name1', 'C:/Users/Data/try.xlsx')
x.loadFile('name2', 'C:/Users/Data/tryagain.xlsx', 'Sheet2')
# access Sheet1
print(x.getData('name1'))
# access Sheet2
print(x.getData('name2'))
如果你真的希望函数是静态的,那么你根本不需要创建一个新类。创建类的主要原因是将其用作可重复使用的结构,以便使用特定于该数据的方法保存数据。
import pandas as pd
# wrap read_excel to make it easier to use
def loadFile(filename, sheetname='Sheet1'):
return pd.io.excel.read_excel(filename, sheetname=sheetname)
def inputData():
x = loadFile('C:/Users/Data/try.xlsx')
print(x)
# the above is exactly the same as
x = pd.io.excel.read_excel('C:/Users/Data/try.xlsx', sheetname='Sheet1')
print(x)
请让我们知道,我们可以进一步帮助您解决这个问题。否则,如果您发现其中一个答复回答您的问题,请接受它。谢谢! – imp9