import numpy as npdata = np.array([[1,2], [3,4]]) np.savetxt('out.txt', data, fmt="%d") #保存为整数np.savetxt('out1.txt', data, fmt="%.2f", delimiter=',') #保存为2位小数的浮点数,用逗号分隔with open('out.txt') as f: for line in f: print(line, end='') 1.pyt
1.1写入空文件 若将文本写入文件,在调用open()时候需要提供另外一个实参,告诉Python你要写入打开的文件 file_path = 'txt\MyFavoriteFruit.txt' with open(file_path,'w') as file_object: file_object.write('I like appple.') 在这个实例中,调用open()提供了两个实参,第一个实参是要打开文件的路径与名称,第二个实参('w')告诉Python,我们将要以写的方式打开这个文件 r
读取csv文件: def readCsv(): rows=[] with file(r'E:\py\py01\Data\system.csv','rb') as f: reads=csv.reader(f) for i in reads: rows.append(i) print rows return rows写入csv文件: def writer(): with file(r'E:\py\py01\Data\system.csv','wb') as f: writer=csv.writer(
控制台程序. 首先定义一个含有任意不同数据类型域的可序列化类: import java.io.Serializable; public class Junk implements Serializable { private static java.util.Random generator = new java.util.Random(); private int answer; // The answer private double[] numbers; // Valuable data