python，pd.read_csv成熟性导入 [英] python, pd.read_csv ripetitive importation

问题描述

我需要使用

 pd.read_csv

重复输入为 第一次导入

a repetitive importation as at first time I import

node_t1 = pd.read_csv('5mins/nodes/N122')
node_t2 = pd.read_csv('10mins/nodes/N122')
node_t3 = pd.read_csv('15mins/nodes/N122')

但是我需要导入#次作为N1，N2，...，N121，N122 第二次:

but I need to import # times as N1, N2, ..., N121, N122 as the second time:

node_t1 = pd.read_csv('5mins/nodes/N121')
node_t2 = pd.read_csv('10mins/nodes/N121')
node_t3 = pd.read_csv('15mins/nodes/N121')

以此类推.

其他问题，您可以在代码中看到一个重复的名称(如"N122")

Other question, as you can see into the code there is a repetitive name (as 'N122')

node_t1 = pd.read_csv('5mins/nodes/N122')
node_t2 = pd.read_csv('10mins/nodes/N122')
node_t3 = pd.read_csv('15mins/nodes/N122')

有一种简单的方法可以将代码"N122"替换为"N"为

there is a simple method to substitute in the code 'N122' to 'N' as

node_t1 = pd.read_csv('5mins/nodes/N')
node_t2 = pd.read_csv('10mins/nodes/N')
node_t3 = pd.read_csv('15mins/nodes/N')

因此，对于每个节点，我都像以前一样保留相同的代码，而对于其他代码，我只更改了一次节点名称(N122，N121等).

so I keep the same code, like before, for each node and with other code I change only one time the node name (N122, N121,...).

有一个简单的方法可以做到这一点吗?

There is a simple method to do this?

推荐答案

可以使用

That can be done using a formatted string and a loop like:

def read_nodes(node_number):
    n1 = pd.read_csv('5mins/nodes/N%d' % node_number)
    n2 = pd.read_csv('10mins/nodes/N%d' % node_number)
    n3 = pd.read_csv('15mins/nodes/N%d' % node_number)
    return n1, n2, n3


for i in range(150):
    node_t1, node_t2, node_t3 = read_nodes(i)

    # process nodes for node i here
    ....

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