这是 PHP 和其他编程语言中的常见任务。我是从 PHP 开发人员转过来的。 我想确定这个系列。 任何精通 python 的人请帮助我清楚地理解。 这是我从 PHP 代码中收集的。
<?php
$php = array(1,2,3,4,5,6,7,8,9,10);
for ($i = 0; $i < 10 ; $i ++)
echo $php[$i]."<br>";
?>
=>Python 中有什么?
<?php
for ($i = 0; $i < 10 ; $i ++)
echo $php[$i] = $i +1 ;
?>
=>Python 中有什么?
<?php
$php = array(1,2,3,4,5,6,7,8,9,10);
foreach ($php as $value)
echo $value."<br>";
?>
=>Python 中有什么?
<?php
$arr = array(1, 2, 3, 4);
foreach ($arr as &$value) {
$value = $value * 2;
}
// $arr is now array(2, 4, 6, 8)
?>
=>Python 中有什么?
<?php
$arr = array("mot"=>"one", "hai"=>"two","ba"=> "three");
foreach ($arr as $key => $value) {
echo "Key: $key; Value: $value<br />\n";
}
?>
=>Python 中有什么?
<?php
$arr = array("one", "two","three");
while (list($key, $value) = each($arr)) {
echo "Key: $key; Value: $value<br />\n";
}
?>
=>Python 中有什么?
<?php
$arr = array("one", "two","three");
while ($element = each($arr)) {
echo "Key: $element['key']; Value: $element['value']<br />\n";
}
?>
=>Python 中有什么?
<?php
$products = array( array("ITL","INTEL","HARD"),
array("MIR", "MICROSOFT","SOFT"),
array("Py4C", "pythonkhmer.wordpress.com","TUTORIAL")
);
for ($row = 0; $row < 3; $row++)
{
for ($col = 0; $col <3; $col++)
{
echo "|".$products[$row][$col];
}
echo "<br>";
}
?>
=>Python 中有什么?
最佳答案
所有这些都非常明显。我仅列出了执行这些操作的 Pythonic 方法。更新:示例现在应该可以在 Python 2 和 Python 3 中运行。在 Python 2 中,您可以用 xrange() 代替 range() 并用 iteritems() 代替 items() 以提高效率。
示例 1
PHP
$php = array(1,2,3,4,5,6,7,8,9,10);
for ($i = 0; $i < 10 ; $i ++)
echo $php[$i]."<br>";
Python(通常您迭代 Python 中的列表,而不是通过索引访问):
lst = [1,2,3,4,5,6,7,8,9,10]
for item in lst:
print(str(item) + "<br>")
例子2
for ($i = 0; $i < 10 ; $i ++)
echo $php[$i] = $i +1 ;
python :
lst = range(1, 11)
for item in lst:
print(item)
或者也许:
lst = []
for i in range(10):
lst.append(i + 1)
print(lst[-1]) # prints out last element
示例 3
$php = array(1,2,3,4,5,6,7,8,9,10);
foreach ($php as $value)
echo $value."<br>";
与第一个相同
例子4
$arr = array(1, 2, 3, 4);
foreach ($arr as &$value) {
$value = $value * 2;
}
python :
lst = [1, 2, 3, 4]
lst = [val * 2 for val in lst]
示例 5
$arr = array("mot"=>"one", "hai"=>"two","ba"=> "three");
foreach ($arr as $key => $value) {
echo "Key: $key; Value: $value<br />\n";
}
Python(注意 {...}
在 Python 中创建了一个 dict [字典],而不是列表/):
dct = {'mot': 'one', 'hai': 'two', 'ba': 'three'}
for key, value in dct.items():
print("Key: %s; Value: %s<br />" % (key, value))
例子6
$arr = array("one", "two","three");
while (list($key, $value) = each($arr)) {
echo "Key: $key; Value: $value<br />\n";
}
python :
lst = ['one', 'two', 'three']
for key, value in enumerate(lst):
print("Key: %d; Value: %s<br />" % (key, value))
示例 7
$arr = array("one", "two","three");
while ($element = each($arr)) {
echo "Key: $element['key']; Value: $element['value']<br />\n";
}
没有与此直接对应的 Python。
例8
$products = array( array("ITL","INTEL","HARD"),
array("MIR", "MICROSOFT","SOFT"),
array("Py4C", "pythonkhmer.wordpress.com","TUTORIAL")
);
for ($row = 0; $row < 3; $row++)
{
for ($col = 0; $col <3; $col++)
{
echo "|".$products[$row][$col];
}
echo "<br>";
}
python :
products = [['ITL', 'INTEL', 'HARD'],
['MIR', 'MICROSOFT', 'SOFT'],
['Py4C', 'pythonkhmer.wordpress.com', 'TUTORIAL']]
for product in products:
for item in product:
print('|' + item)
print('<br>')
或者更像 Pythonic 的版本:
for product in products:
print('|%s<br>' % ('|'.join(product)))
关于php - 了解: From PHP Array to Python?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/1781617/